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How to calculate dog food portions by calories when switching brands?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | spayed | 3 years and 7 months old

Regarding Tasha and her Weight, you said to feed her 1.5 cups 2 x per day. How much is .5 cups? Is that the same as one half? If not, is .5 more or less than the 2/3 cups I now feed her? Plus, the one cup, of course. I am thinking of changing her to Large Breed Dog Chow - Nutro is the Brand. Does the 1.5 cups 2 x per day, still stand, with the Large Breed Chow? Right now, she is getting the regular-sized dog, under 50 lbs., Dog Chow, of Nutro-Lite.

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on November 19th, 2016

Yes .5 is half a cup. It is less than the 2/3cup you are currently feeding Tasha (plus the one cup), but based on the calorie amount you provided for one cup and her daily calorie requirement, she should be fed one and a half cups twice a day. As for changing her food, I can't say if she should be fed the same amount with the large breed food because each cup may be a different amount of calories. To figure it out, you divide 1,100 by the the calorie amount of each cup to get the number of cups she should be eating per day. Then divide it into two equal portions per day. I will type out the example for her current food: 1100 calories required by day / 364 calories per cup = 3 cups per day 3 cups per day / 2 meals in a day = 1.5 cups twice a day If you do change her food, it needs to be done slowly to avoid GI upset.

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