Feeding by breed and weight / Toy group
How much to feed a Chihuahua
A neutered adult Chihuahua at 6 lb needs about 237 kcal a day, which is ¾ cups of a 369 kcal/cup food; at the 3 lb end of the breed's range it is 141 kcal, or ½ cups. That is the maintenance figure before treats, from the resting energy requirement formula and the Merck Veterinary Manual's factor of 1.6 for a neutered adult.
Chihuahua feeding table by weight and life stage
Each row is a Chihuahua at that weight. Columns are the Merck factors: a neutered adult (×1.6), an intact adult (×1.8) and a dog that is inactive or gains weight easily (×1.4). Cups assume 369 kcal per cup, the label figure for Purina Pro Plan Complete Essentials Shredded Blend Chicken & Rice (adult dry); change it to your bag's number on the sizer.
| Weight | RER | Neutered adult | Cups | Intact adult | Cups | Inactive / weight-prone | Cups |
|---|---|---|---|---|---|---|---|
| 3 lb (1.4 kg) | 88 | 141 kcal | ½ | 159 kcal | ½ | 123 kcal | ¼ |
| 6 lb (2.7 kg) | 148 | 237 kcal | ¾ | 267 kcal | ¾ | 208 kcal | ½ |
RER = 70 × kg0.75; factors from the Merck Veterinary Manual. Calorie density from the Purina product page (3790 kcal/kg, 369 kcal per 8 oz cup, about 96 g). Checked 2026-10-20.
Why the number is lower than the bag says
Bag feeding guides are written for an active, intact adult and often run above the neutered-maintenance figure; for a 6 lb Chihuahua the gap between the intact and neutered columns is 30 kcal a day, roughly 0.1 cups. A dog that is already carrying extra weight should start from the inactive column (208 kcal at 6 lb) and be weighed every two weeks. Treats and chews count: a single dental chew can be 70–100 kcal, a sizeable share of a small dog's day.
Formulas get a healthy adult into the right range; body condition keeps it there. Ribs should be easy to feel under a thin layer of fat, and the dog should have a visible waist from above. If that is not the case after four weeks, adjust by about 10% and re-check — and ask your vet before changing a dog with a medical condition, a pregnant or nursing female, or a working dog in season.
Grams and meals
At 6 lb and 237 kcal, ¾ cups is about 72 g a day of a 96 g/cup kibble — a kitchen scale is more repeatable than a scoop. Split into two meals for an adult. Puppies eat more per pound and more often: see the Chihuahua puppy feeding chart.
How the Chihuahua compares
Calories per pound fall as dogs get bigger, because RER scales with weight to the 0.75 power rather than linearly. A 6 lb Chihuahua needs 40 kcal per pound; a 7 lb Pomeranian needs 266 kcal (38 per lb), a 6.5 lb Poodle (Toy) needs 252 kcal (39 per lb), a 7 lb Yorkshire Terrier needs 266 kcal (38 per lb). The breed ranks 1 of 49 by weight on this site.
Adult weight from AKC breed standard (PDF), checked 2026-10-20. Figures are maintenance starting points for a healthy adult; they are not veterinary advice.