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How much to feed

My vet said my dog is overweight, what should I do first?

Last updated 23 September 2026 · How we write and check this

Short answer

Ask your vet for a target healthy weight and, if possible, a suggested daily calorie amount, since this gives you a concrete number to work from rather than guessing. Then calculate the grams of your current food that deliver that calorie target, reduce gradually over a week or two rather than cutting sharply, and recheck body condition every two to three weeks.

Getting a clear target

A specific target weight and a general sense of your dog's current body condition score gives you a concrete goal, which is far more useful than a vague instruction to feed less.

If your vet has not given a specific calorie or gram amount, you can calculate a reasonable starting reduction yourself, around 10 to 20 percent below current intake, and confirm the approach at your next check.

Making the change

Reduce the daily amount gradually over one to two weeks rather than cutting sharply overnight, which tends to be easier for your dog to adjust to and easier for you to stick with.

Consider whether treats, table scraps, or extras are adding calories on top of the measured main meals, since these are a common overlooked source of extra calories that can undermine an otherwise correct main meal reduction.

Tracking progress

Weigh your dog every two to three weeks on a consistent scale and bring that data to follow up vet visits, since a documented trend is more useful to your vet than a single check in weight.

Expect gradual progress, generally 1 to 2 percent of body weight lost per week, and stay in touch with your vet if progress seems much faster or much slower than expected, since either extreme is worth a second look before continuing the plan unchanged.

Key takeaways

  • Ask your vet for a specific target weight and, if possible, a suggested daily calorie or gram amount.
  • Reduce food gradually over one to two weeks rather than cutting sharply overnight.
  • Check for extra calories from treats or table scraps that might be undermining the main meal reduction.
  • Track weight every two to three weeks and share the trend with your vet at follow up visits.