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My dog is vomiting, tired, and losing weight after new food?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | 1 year and 3 months old | 50 lbs

pit mix has been throwing up this past week. We had switched to Rachel Ray dog food just before this began. Initially we thought maybe it was because he ate a baby toy, and some mobic. Then my pug started vomiting. Not as bad as the pit. Pug seems better, fasted them (back to the pit), no diarrhea, no blood, seems to hold down water, chicken/rice. Tried his regular dog food, throws it up. Seems a bit more tired, losing weight but acts normal otherwise. Gums are pink. He's about 10 months old

1 Answer

Most Helpful Answer

Lauren Jones VMD

Answered By Lauren Jones VMD

Veterinarian

Published on April 16th, 2019

Since both Buster and your pug experienced vomiting after the diet change, it stands to reason that the new diet may be associated with this issue. However, Buster’s ingestion of Mobic (meloxicam) could also be associated with his GI upset. Overdoses of meloxicam can also cause kidney damage, which can also result in lethargy and vomiting. Since Buster is still lethargic, it would be best to take him to his vet for an exam and blood work to check his kidney values. If his vomiting continues, he will also likely need abdominal xrays to determine if an intestinal obstruction is present due to the toy that he ate. After any possible medical issues have been addressed, it may be best to avoid using this particular diet. Just remember that anytime you change a dog’s diet to do so gradually by mixing the foods together over 5-7 days. I hope this helps and that all goes well!
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