Puppy Feeding Guide (0–12 Months)

Puppies need significantly more calories per pound than adult dogs. During the first four months, puppies require approximately 3 times their resting energy requirement (RER). From 4 to 12 months (or up to 24 months for giant breeds), this drops to about 2 times RER. The RER formula is 70 × (body weight in kg)^0.75. For example, a 20-lb puppy needs roughly 600–700 calories per day at 5 months of age.

Puppies under 4 months should eat 4 times per day to maintain blood sugar and support rapid growth. From 4 to 6 months, reduce to 3 meals. After 6 months, most puppies do well on 2 meals per day. Very small breed puppies (Yorkies, Chihuahuas) may need to stay on 3 meals per day longer to prevent hypoglycemia.

Always feed a food labeled for "growth" or "all life stages" — adult dog food does not have the right nutrient ratios for puppies. Large breed puppies (expected adult weight over 50 lbs) should eat a large-breed puppy formula with controlled calcium and phosphorus levels to prevent developmental orthopedic disease. Small breed puppies need calorie-dense food with small kibble size.

The transition age depends on breed size: small breeds (under 20 lbs) at 9–12 months, medium breeds (20–50 lbs) at 12 months, large breeds (50–100 lbs) at 12–18 months, and giant breeds (100+ lbs) at 18–24 months. Transition gradually over 7–10 days, mixing increasing amounts of adult food with decreasing amounts of puppy food.

An overfed puppy will develop a rounded belly, loose stools, and may grow too quickly (especially concerning for large breeds). An underfed puppy will have visible ribs without much muscle coverage, low energy, and slow growth. Use body condition scoring — you should be able to feel ribs with light pressure but not see them prominently. Adjust portions every 2–4 weeks as your puppy grows.