Ask the Experts — Vets & Nutritionists Answer

Read the ingredient list — but learn how to read it correctly. Ingredients are listed in descending order by weight, so the first ingredient is the most abundant. Confirm that the first or second ingredient is a named meat: chicken, beef, salmon, lamb. If you see "meat by-products," "corn gluten meal," or "wheat flour" near the top, look more carefully.

Second, find the nutritional adequacy statement. It should say: "formulated to meet the nutritional levels established by the AAFCO Dog Food Nutrient Profiles" or state that it has passed a "feeding trial." The latter is the more rigorous standard — it means real dogs were fed the food and monitored.

Third, match the food to your dog's life stage. Puppy, adult, and senior dogs have different nutritional requirements. "All Life Stages" foods are formulated to puppy standards and can provide excess calories and certain minerals for adult and senior dogs.

— Dr. Sarah Kim

Honestly, for most dogs, there's no evidence that grain-free food is superior. Grain allergies in dogs are genuinely rare. The food allergies I see clinically are almost always to animal proteins — chicken, beef, dairy, and eggs — not grains.

What concerns me more is the FDA's ongoing investigation into DCM (dilated cardiomyopathy) that started in 2018. We've seen increased DCM reports in breeds not genetically predisposed, and most of those dogs were eating high-legume grain-free diets. The hypothesis is that legumes (peas, lentils, chickpeas) in large quantities may impair taurine synthesis or absorption. The causal link hasn't been definitively established, but there's no good reason to take an unnecessary risk.

If you genuinely suspect a grain intolerance or allergy, don't switch to grain-free unilaterally. Run a proper elimination diet under veterinary guidance — that's the right diagnostic approach.

— Dr. Sarah Kim

It's true — but the mechanism matters. The issue isn't treats themselves, it's the quantity, timing, and pattern.

The general guideline is to keep treats under 10% of total daily calorie intake. For a 5 kg adult dog with a daily requirement of roughly 350 kcal, that's about 35 kcal from treats — which might be 3–7 small training treats, depending on the product.

The real problem is "selective appetite" — when dogs learn that holding out on their regular food eventually produces something better. This conditioning happens quickly, especially when owners offer treats as a substitute when a dog refuses its meal. Once that pattern is established, it's hard to reverse.

Use treats with intention: training rewards, medication delivery, scheduled enrichment. Keep treat time separate from meal time. Small, frequent training treats are fine — the volume is what matters.

— James Park, CVN

The intent is always good — owners want to know exactly what their dog is eating. But the execution is genuinely difficult, and I want to be honest about that.

The biggest issue with home-cooked diets is nutritional completeness. Research has found that over 95% of home-cooked dog diet recipes available online are deficient in at least one essential nutrient. Calcium-to-phosphorus imbalance is particularly dangerous for growing puppies and can cause developmental skeletal problems.

To do home cooking safely, you need a recipe formulated by a board-certified veterinary nutritionist (ACVN-credentialed) specifically for your dog's age, weight, and health status. "Mix some meat and vegetables" is not a balanced diet.

The recipe will require precise supplementation — a calcium source (bone meal or calcium carbonate), omega-3, zinc, and various B vitamins at calculated levels. If you're seriously interested, please consult a veterinary nutrition specialist before starting. It's absolutely doable — but not without proper planning.

— James Park, CVN

Slow down. Abrupt food changes are a leading cause of digestive upset — vomiting, diarrhea, reduced appetite. The gut microbiome needs time to adapt to the new food's protein sources and fermentable fiber composition.

The standard transition schedule I recommend: - Days 1–2: 75% old food, 25% new food - Days 3–4: 50% old / 50% new - Days 5–6: 25% old / 75% new - Day 7+: 100% new food

For dogs with sensitive digestion, history of food allergies, or who are recovering from antibiotic treatment, extend this to 2–3 weeks.

And after completing the switch, allow at least 8 weeks on the new food before evaluating results. Skin changes, coat quality, and digestive improvements take time to manifest. Drawing conclusions at 2–3 weeks is too early and often misleading.

— Dr. Sarah Kim