Dog Food Ingredients: The Essential Guide

Written by
Elin Eriksson
Reviewed by
Prof. David Walsh, Ph.D.Knowing the ingredients in your dog's food will help you make sure that your dog is getting the best nutrition possible and is not getting empty calories from a filler ingredient.
Sources of protein in your dog food should be labeled specifically such as "chicken meal" or "salmon."
An AAFCO statement assures that the food is nutritionally complete for a specific life stage of your dog.
The storage recommendations will protect your dog food from bacterial contamination and help keep essential nutrients intact.
Life stage needs are specific; puppies require nutrient-density in protein as opposed to more senior dogs that require different levels of protein.
Diet transitions need to be gradual to prevent an upset stomach when changing food.
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It's vital to understand dog food ingredients as what lands in their bowl plays a primary role in their health and longevity. I've seen dogs live many years longer by switching to quality foods with conscientious ingredients; everything we do matters to their vitality from nose to tail.
I want to teach you to translate labels properly so you can discover good ingredients from clever marketing. You'll find the true fuel of your dog's energy, digestion, and glossy skin and coat. Knowledge is power; it takes confusion to empowerment for your companion!
Observe how proper nutrition makes all the difference in the world. A happy dog jumping across the yard, firm stools when walked, and a shiny, soft coat. These are the real hallmarks of your smart choices paying off. Let's get started on this journey to better health together.
Understanding Dog Food Labels
When reading dog food labels, it is important to know that ingredients are listed in order of their weight prior to cooking. Foods such as chicken or salmon, which are good protein sources, should be listed near the top, indicating that they are the primary food source of the formulation. Then come the carbohydrates, such as brown rice, followed by fats, like fish oil. This is a true picture of what fills your dog's bowl.
Look at the guaranteed analysis for the minimum percentages of protein and fat. Adult dogs require at least 22 percent protein and 8 percent fat to maintain their energy and muscle mass. Look for the AAFCO statement stating that the food is healthy for your dog's life stage, whether it is puppy, adult, or senior.
Watch out for nebulous phrases like food animal derivatives' as this term frequently conceals unknown and lower quality ingredients. Insist on named ingredients such as meat meal or chicken fat. Furthermore, keep a constant check on the expiry dates, as nutrients slowly or quickly deteriorate with age and can compromise the dog's good health. It is essential always to provide fresh food to obtain the maximum benefit for your dog.
I've seen many dogs in clinical practice develop skin problems when they eat rancid food with broken-down Omega fatty acids. This is avoided with the correctly labeled products. When you understand this, you become a more informed advocate for your pet's nutrition. You'll be able to see the quality at a glance.
Named Protein Sources
- Clarity: Specific sources like 'chicken meal' or 'salmon' indicate quality
- Meal vs Fresh: Meal is concentrated protein; fresh has high water content
- Quality Check: Avoid generic terms like 'meat' which lack transparency
- Nutritional Value: Named sources ensure consistent protein quality
Guaranteed Analysis
- Protein Minimum: Look for at least 22% for adult dogs, 28% for puppies
- Fat Minimum: Minimum 8% supports skin/coat health and energy
- Fiber Maximum: Under 5% prevents digestive issues in most dogs
- Moisture Maximum: Dry food ≤10% (≤100g/kg), wet food ≤78% (≤780g/kg)
AAFCO Statement
- Life Stage Approval: Must specify 'growth' (puppy), 'maintenance' (adult), or 'all life stages'
- Testing Methods: 'Formulated' (lab-tested) or 'feeding trials' (real-dog tested)
- Completeness Claim: Ensures all essential nutrients are present in proper ratios
- Reliability: Never purchase food without this verification statement
Vague Terminology
- Red Flags: Terms like 'animal derivatives' or 'meat by-products' without species specification
- Quality Risk: Allows manufacturers to change ingredients between batches
- Allergy Concerns: Impossible to identify allergens with generic terms
- Better Alternatives: Demand specific sources like 'beef liver' or 'turkey meal'
Expiration Dates
- Freshness Indicator: 'Best by' dates ensure nutrient potency and safety
- Storage Impact: Proper storage extends freshness; dry food lasts 12-18 months unopened
- Rancidity Risk: Fats degrade over time; discard if oily smell or discoloration appears
- Post-Opening: Use dry food within 6 weeks, refrigerate wet food ≤72 hours
Essential Nutrients and Their Sources
Animal proteins from chicken or salmon supply the dog with complete amino acids that he cannot manufacture, with over 90% absorption, so that almost the entire nutrient is absorbed by the dog. Proteins of pea or lentil origin have only 70-80% absorption. Puppies raised on vegetarian diets had difficulty in growth and were then switched to animal sources of protein.
Balance omega-3s and omega-6s very specifically for skin and joints. The ratio should be 5:1 - 10:1 with fish oils and sunflower oil. This will produce a dramatic decrease in inflammatory processes. Dogs with arthritis in my clinic have shown increased mobility in just weeks with the repair of this balance.
Carbohydrates provide instant energy and assist the digestive tract through fiber. Oats and sweet potatoes release glucose relatively steadily, preventing a sudden energy drain. Fiber in pumpkin regulates bowel activity. Active dogs should receive 30-60% of their diet from carbohydrates. Consequently, be aware of your dog's activity level to adjust their intake accordingly.
For bone development, ensure a strict calcium-phosphorus ratio of 1.2:1. That is 12g calcium to 10g phosphorus per kg of food, otherwise the bones become weak. I remember a Great Dane puppy that had fractures, his X-rays improved once this ratio was corrected in his food.
Proteins
- Amino Acids: 10 essentials dogs can't produce (e.g., arginine, lysine)
- Bioavailability: Animal proteins >90% digestible vs plants 70-80%
- Daily Needs: Puppies 28%+, adults 22%+, seniors 18%+
- Quality Signs: Named sources (chicken meal vs meat meal)
Fats & Fatty Acids
- Omega-6: Minimum 1% (10g/kg) for skin health (sunflower oil)
- Omega-3: Minimum 0.5% (5g/kg) for joints (fish oil, flaxseed)
- Balance: Ideal omega-6:omega-3 ratio = 5:1 to 10:1
- Deficiency Signs: Dry coat, poor wound healing
Vitamins
- Fat-Soluble: A (vision) 5000 IU/kg; D (bones) 500 IU/kg; E (antioxidant) 50 IU/kg
- Water-Soluble: B-complex (energy) in liver/eggs; C synthesized by dogs
- Toxicity Risks: Excess vitamin A causes bone deformities
- Natural Sources: Organs provide concentrated vitamins
Minerals
- Macro-Minerals: Calcium 1.0% (10g/kg), Phosphorus 0.8% (8g/kg)
- Trace Minerals: Zinc 120mg/kg, Iron 80mg/kg, Selenium 0.35mg/kg
- Synergies: Vitamin D aids calcium absorption
- Deficiency Risks: Weak bones (calcium), anemia (iron)
Water
- Daily Needs: 50-60ml per kg body weight (1.7-2oz per lb)
- Hydration Signs: Elastic skin, moist gums, clear urine
- Food Sources: Wet food (70-78% moisture), dry food (≤10%)
- Dehydration Risks: Lethargy, sunken eyes, prolonged skin tent
Carbohydrates
- Energy Source: Simple carbs (sugars) for quick energy
- Complex Carbs: Fiber-rich oats/barley aid digestion
- Daily Needs: 30-60% of diet depending on activity level
- Grain Benefits: Provide B vitamins and minerals
Fiber
- Soluble Fiber: Beet pulp/chicory root feed gut bacteria
- Insoluble Fiber: Cellulose adds bulk to stool
- Daily Needs: 2.5-4.5% (25-45g/kg) for digestive health
- Sources: Pumpkin (0.5g fiber per 10g), sweet potatoes
Controversial Ingredients Debunked
Animal by-products, including the organs such as liver, kidneys, etc., are powerhouses of nutrition and are not grades of food below meat and meat by-products. These organs contain concentrated iron and B vitamins that are deficient in muscle meat. I have fed them to anemic dogs in recuperative diets with marvelous success. AAFCO regulations state that only the safe and useful parts can be used.
Through 15,000 years of domestication, dogs digest grains with ease. The enzymes for digesting starches in dogs are seven times more active than a wolf's. Grain-free diets are necessary only for dogs with proven allergies. Most dogs do well on high-quality, grain-inclusive diets, which can result in a bright coat.
Raw food diets can harbor severe bacterial risks, such as Salmonella, but cooking removes that risk. According to CDC data, almost half of pet food-related infections are traceable to raw foods. In my clinic, we recommend lightly cooked alternatives that preserve nutrients and do not carry the same danger.
Opt for natural preservatives such as mixed tocopherols (vitamin E) instead of artificial preservatives like BHA/BHT. Natural types are effective at preventing rancidity from occurring and are "safe". The artificial ones may cause excessive irritability. Carrageenan, derived from seaweed, is considered safe by the FDA, despite numerous myths surrounding it. However, its safety is accepted when it is included in good, balanced formulas.
Animal By-Products
- Myth: 'By-products are unhealthy fillers'
- Fact: Organs like liver and kidney provide concentrated iron, B vitamins, and amino acids
- Science: AAFCO requires by-products to exclude non-nutritive parts like hair or hooves
- Sustainability: Using organs reduces waste while providing complete nutrition
Grains in Dog Food
- Myth: 'Grains cause allergies and are hard to digest'
- Fact: Most dogs efficiently digest grains due to evolutionary adaptations over 15,000 years
- Science: Digestive enzymes for starches are 7x more active in dogs than wolves
- Reality: Grain-free diets only necessary for confirmed allergies (<10% of dogs)
Raw Meat Diets
- Myth: 'Raw food is safer and more natural'
- Fact: Cooking eliminates Salmonella and E. coli risks present in raw ingredients
- Research: CDC data shows raw diets cause 48% of pet food-related bacterial infections
- Alternative: Lightly cooked or freeze-dried options preserve nutrients safely
Artificial Preservatives
- Myth: 'All preservatives are dangerous chemicals'
- Fact: Natural options like mixed tocopherols (vitamin E) prevent fat rancidity safely
- Risk Comparison: BHA/BHT may cause hyperactivity; rosemary extract has antioxidant benefits
- Detection: Check ingredient sources - some preservatives added before manufacturing
Fillers like Cellulose
- Myth: 'Fillers offer no nutritional value'
- Fact: Insoluble fiber regulates stool consistency and aids weight management
- Function: Provides bulk with minimal calories (0.5g/0.0176oz sugar per 250g/8.8oz serving)
- Benefit: Essential for senior dogs with sensitive digestion
Carrageenan
- Myth: 'This thickener causes inflammation'
- Fact: Derived from seaweed; Generally Recognized As Safe (GRAS) by FDA
- Research: Limited evidence in pets; human studies show safety at approved levels
- Alternative: Guar gum or agar-agar provide similar texture benefits
Life Stage Nutritional Needs
For rapid growth, puppies need a protein source with 28% or more, and they also require a sufficient amount of DHA for brain development. I suggest taking 300 mg of fish oil daily. If they do not get enough DHA, I have seen them experience problems with coordination during the first few training sessions. They also need a food that is high in calories for constant energy.
Dog food for adult dogs is 22% protein, moderate fat 8-12% depending on the activity of the animal. Adjust amounts fed monthly. My border collie patients need higher fat for agile work. Balanced omega fatty acids keep skin healthy, which prevents the dry coats I often see in the clinic.
Senior dogs require 18% highly digestible protein, such as that found in eggs or fish, plus joint supplements. Glucosamine and chondroitin can help reduce arthritis pain, and I've seen older dogs regain mobility with the use of these supplements. Reducing calorie intake can help prevent obesity, which can strain aging joints.
Mother and lactating dogs require 32% protein and 20-25% fats for the production of milk. They should be free-fed. I once had a Labrador that produced 10 puppies, which was triple her normal consumption. Extra calcium will prevent them from developing the deadly condition of eclampsia.
Puppy Development
- Brain Growth: DHA 300mg/day (0.01oz/day) supports cognitive development
- Bone Formation: Calcium:phosphorus ratio 1.2:1 (1.8g:1.5g per 100g)
- Immune Support: Vitamin E (50 IU/kg) and zinc (120mg/kg)
- Feeding Frequency: 3-4 meals/day for stable energy
Adult Maintenance
- Weight Management: Fiber (4-6%) promotes fullness; calorie control 350-450 kcal/cup (75-95 kcal per 50g)
- Active Dogs: Higher fat (12%) for endurance athletes
- Skin/Coat Health: Omega-3 (0.5%) reduces inflammation
- Hydration: Wet food options (70-78% moisture) encourage water intake
Senior Wellness
- Joint Support: Glucosamine 500mg (0.0176oz) + chondroitin 400mg (0.014oz) per 1,000 kcal
- Kidney Health: Reduced phosphorus (0.4-0.6%); increased water content
- Cognitive Function: Antioxidants (vitamins C/E) and L-carnitine (50mg/kg)
- Digestibility: Easily absorbed proteins like fish or eggs
Transitioning Between Foods
- Method: 25% new + 75% old for 3 days; 50/50 for 3 days; 75/25 for 3 days
- Monitoring: Check stool consistency; firm indicates successful transition
- Allergy Watch: Introduce novel proteins slowly (duck, venison)
- Vet Consultation: Required for dogs with health conditions
Pregnant/Lactating Dogs
- Calorie Needs: 2-4x normal intake; high-fat for milk production
- Calcium Boost: Extra 50% calcium (2.7g/kg) to prevent eclampsia
- Protein Quality: Highly digestible sources like chicken/egg at 32%+
- Feeding Method: Free-choice access to food at all times
Safety and Storage Guidelines
Store all dry food in airtight containers or bags in a cool, dry, and dark location. Store in an area with a temperature below 80°F. After the bag is opened, food should be used within six weeks. Wet food must be refrigerated after opening and used within three days to prevent spoilage.
Be clear about expiration dates. "Best by" is peak quality; "use by" is the last safe date. Never feed expired food. Once a terrier vomited profusely after eating food six months beyond its expiration date. Always check the date before you serve.
Prevent bacterial contamination by washing food dishes daily and keeping food out of the danger zone of 40-140 degrees F. Wash your hands after handling raw ingredients. In our clinic, when owners follow these easy steps, we see fewer infections.
Immediately follow recall procedures if announced. Check the lot numbers against the recall list, cease feedings, and notify your veterinarian of any symptoms. I assisted clients with recalls by enrolling them in FDA alerts. Be proactive for your dog's safety.
Dry Food Storage
- Container Type: Airtight containers prevent moisture/oxygen exposure
- Location: Cool, dark place below 80°F (27°C); avoid garages/sheds
- After Opening: Use within 6 weeks; discard if rancid odor appears
- Original Bag: Keep inside container to preserve batch information
- Portion Control: Use measuring cups to avoid hand contamination
Wet Food Handling
- Unopened Cans: Store at room temperature ≤75°F (24°C) for ≤2 years
- After Opening: Refrigerate ≤40°F (4°C); use within 72 hours (3 days)
- Serving: Warm to room temperature; discard uneaten food after 1 hour
- Cross-Contamination: Use clean utensils; never return food to can
- Alternative Packaging: Tetra Paks last longer than cans when unopened
Freezing Guidelines
- Raw Diets: Store at 0°F (-18°C); thaw in refrigerator 24 hours
- Portioning: Freeze in meal-sized containers to avoid refreezing
- Thawed Food: Use within 48 hours; never refreeze thawed food
- Freezer Life: 3-6 months maximum for optimal nutrient retention
- Vacuum Sealing: Extends freezer life to 12 months without freezer burn
Homemade Food Storage
- Refrigeration: Store ≤40°F (4°C); use within 48 hours maximum
- Freezing: Portion into ice cube trays for single servings
- Preservation: Add vitamin E oil (1 drop per cup) as natural preservative
- Bacterial Safety: Cook to 165°F (74°C); avoid raw eggs/meats
- Nutrient Loss: Reheating reduces vitamins; add fresh ingredients before serving
Temperature Danger Zone
- Critical Range: 40-140°F (4-60°C) where bacteria multiply fastest
- Thawing Method: Refrigerator thawing only, never countertop
- Hot Holding: Keep cooked food ≥140°F (60°C) if not served immediately
- Cooling Protocol: Divide large batches into shallow containers
- Time Limit: Discard food left in danger zone >2 hours (>1 hour if >90°F/32°C)
Bacterial Risks
- Salmonella Sources: Raw meat, eggs; kills at 165°F (74°C)
- Prevention: Wash hands after handling food; sanitize bowls daily
- High-Risk Groups: Puppies/seniors need extra precautions
- Symptom Monitoring: Vomiting/diarrhea requires vet attention
- Disinfection: Use 1:10 bleach solution (60ml bleach + 540ml water) for surfaces
Pest Control
- Storage: Elevate food off floor; use containers with tight seals
- Inspection: Check for weevils or moths in grains monthly
- Infestation Response: Discard entire batch; clean with vinegar solution
- Prevention: Bay leaves or food-grade diatomaceous earth as deterrents
- Rodent Proofing: Metal containers prevent gnawing
Mold Prevention
- Humidity Control: Keep storage areas <60% humidity
- Visible Mold: Discard entire bag if any mold present
- Aflatoxin Risk: Especially dangerous in corn/grains
- Detection: Musty odor indicates hidden mold growth
- Prevention: Silica gel packets in storage containers
Recall Procedures
- Registration: Sign up for brand recall alerts
- Batch Tracking: Save lot numbers from packaging
- Response: Immediately stop using recalled food
- Documentation: Keep purchase receipts for refunds
- Vet Consultation: Required if symptoms appear post-consumption
Travel Storage
- Portable Containers: Use airtight, lightweight containers
- Temperature Control: Cooler with ice packs for <40°F (4°C)
- Portioning: Pre-measure servings in zipper bags
- Duration: Maximum 2 days without refrigeration
- Water Safety: Avoid local water; use bottled water for rehydration
5 Common Myths
Animal by-products are low quality fillers having no nutritional value in dog foods.
Contrary to popular belief, animal by-products such as liver, kidneys, and lungs, are very nutritious ingredients rich in essential vitamins, minerals and amino acids needed for canine health. The Association of American Feed Control Officials very firmly regulates the use of by-products excluding all non-nutritive parts such as hair or hoof parts, thereby insuring that these organ meats give a concentrated nutrition often equal to or greater than muscle meats in density of nutrients and also serves to promote the economy of food supply by utilizing the entire animal. Veterinary nutritionists advise that these ingredients are superior in bioavailability of nutrients such as iron and B vitamins, than are many vegetable ingredients.
Grain-free diets are always healthier and more natural options for all dogs regardless of their individual needs.
This misconception overlooks the fact that most dogs efficiently digest grains due to evolutionary adaptations over thousands of years of domestication. Scientific studies show canine digestive enzymes for starches are significantly more active than in wolves, making grains like oats and barley valuable sources of energy, B vitamins, and fiber. Grain-free diets should only be considered for the less than 10% of dogs with confirmed grain allergies, as unnecessary elimination may deprive dogs of beneficial nutrients while increasing risks of heart disease according to FDA research on diet-related canine health issues.
Raw food diets are far safer and more natural than the commercial pet foods available today.
Raw diets carry significant risks of bacterial contamination with Salmonella and E. coli which may affect both pets and humans with data from the CDC showing that they account for nearly half of all pet food related infections. Cooking food gets rid of harmful pathogens to a significant extent and retains the nutritional value, so mildly cooked food or commerically prepared foods constitute a safer alternative that supplies complete nutrition. Veterinary nutritionists point out that balanced commercial foods are rigorously subject to safety testing and formulation to meet AAFCO standards, helping to eliminate risks of health problems due to nutritional imbalances that homemade raw diets carry which are scientifically unverified.
Cellulosic fillers provide no nutritional benefit and should be avoided in quality dog foods.
@Insoluble fibers such as cellulose are important because they serve to bulk up the stool, regulate bowel movements and cause a feeling of fullness which assists in maintaining proper weight. These substances produce needed gastrointestinal benefits for the dog, particularly for the older animal with sensitive digestion and for the puppy needing greater consistency in the diet. They also add no calories to the diet, since they contain only 0.5 g. of sugar per average serving. Veterinary nutritionists have found that proper levels of these fibers from 2.5 to 4.5% will help maintain good digestion without interfering with the absorption of nutrients in well-balanced rations, and they are far more to be desired as functional ingredients than they are fillers with no denning purpose.
The first ingredient must always be fresh meat to establish a truly high-quality dog food product.
This common misconception does not take into account the fact that rendered meat meals contain a more concentrated protein supply per gram than fresh meats because of the removal of moisture in processing. The ingredients are included in their pre-cooked weight, so that fresh meats with high water content may be highest in the ingredients even though they may be giving less protein, because of occurring later in the list, than meat meals have a higher protein content. It would be much better to determine quality by such protein sources as "chicken meal," rather than go to some other general term, and check up on the, guaranteed analysis, showing that the crude protein is a minimum of 22 per cent, at least for adult dogs, to be sure that an adequate protein supply is being given, which will meet the AAFCO standard.
Conclusion
The knowledge gained from reading dog food labels will give you the power to make truly informed decisions regarding your friend's health. You will be able to identify quality proteins and eliminate harmful fillers. This knowledge will turn your confusion into confidence at the store displays. You will become the very best advocate for your dog.
Always keep in mind the nutritional needs with your pet's own individual needs. Be aware of your age, activity level, and overall health. My dachshund patients require diets different from those of working sheep dogs. The size of the portions and the articles must be tailored to meet, more specifically, the needs of your dog's individual physiology and habits.
Before making significant dietary changes, contact your veterinarian. They may help design personalized plans that address allergies or other medical problems. I have created hundreds of custom diets for dogs with kidney disease or diabetes. Preventing nutritional gaps is readily accomplished with the help of professionals.
When changing foods, transition gradually over about 9 or 10 days, mixing the old and new food. This prevents stomach upset. I see fewer cases of diarrhea when owners follow this method. Your dog's digestion will thank you for the patient approach.
External Sources
Frequently Asked Questions
What are the most important ingredients to look for in dog food?
Prioritize named animal protein sources like chicken, beef, or salmon as the first ingredient. Ensure whole grains or vegetables provide fiber, and check for essential fatty acids from fish oil. Avoid vague terms like 'meat by-products' and artificial preservatives.
How do I know if dog food meets nutritional standards?
Look for an AAFCO statement on packaging confirming complete nutrition for your dog's life stage. This ensures the food provides balanced protein, fats, vitamins, and minerals without harmful deficiencies or excesses.
Is homemade dog food healthier than commercial options?
While homemade food offers ingredient control, it requires careful balancing to meet nutritional needs. Most veterinarians recommend commercial foods meeting AAFCO standards, as homemade diets often lack proper calcium-phosphorus ratios and essential vitamins unless formulated by a veterinary nutritionist.
What vegetables are safe and beneficial for dogs?
These nutrient-rich vegetables are excellent additions to your dog's diet:
- Pumpkin: Aids digestion and provides fiber
- Sweet potatoes: Rich in vitamins A and C
- Broccoli: Contains antioxidants and fiber
- Carrots: Support dental health and vision
- Blueberries: Packed with antioxidants
How should I store dog food to maintain freshness?
Proper storage prevents bacterial growth and nutrient loss:
- Dry food: Airtight containers in cool, dark places
- Wet food: Refrigerate after opening, use within 72 hours
- Avoid temperature danger zones (40-140°F/4-60°C)
- Check expiration dates regularly
- Never refreeze thawed raw food
Are grain-free diets necessary for dogs?
Grain-free diets are only essential for dogs with confirmed grain allergies. Most dogs digest grains efficiently and benefit from their nutrients. Research shows grain-free options may increase heart disease risks in some breeds.
How do nutritional needs change as dogs age?
Life stage requirements vary significantly:
- Puppies: Need 28%+ protein for growth and DHA for brain development
- Adults: Require 22%+ protein with balanced omega fatty acids
- Seniors: Benefit from 18%+ easily digestible protein and joint supplements
- Pregnant dogs: Need 32%+ protein and extra calories
What human foods are dangerous for dogs?
These common foods pose serious health risks:
- Chocolate: Contains theobromine causing toxicity
- Grapes/raisins: Can cause kidney failure
- Onions/garlic: Damage red blood cells
- Xylitol: Leads to rapid insulin release
- Raw dough: Expands in stomach causing blockages
How should I transition my dog to new food?
Transition gradually over 9-10 days to prevent digestive upset:
- Days 1-3: 25% new food mixed with 75% current food
- Days 4-6: Equal parts new and current food
- Days 7-9: 75% new food with 25% current food
- Monitor stool consistency throughout the process
- Consult your vet if digestive issues occur
What does a premium dog food label indicate?
Premium foods feature specific, high-quality ingredients like deboned chicken or salmon meal. They clearly state guaranteed analysis percentages and include whole food nutrients rather than synthetic additives. Look for life-stage appropriateness and manufacturing quality certifications.