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Why is my dog not eating and vomiting after trying new food?

Updated On September 23rd, 2025

Pet's info: Dog | Chihuahua | Male | unneutered | 4.5 lbs

My dog is not eating his food at all he just eat one or two pieces then throw his food.We decided to change his food but still not eating at all

2 Answers

Most Helpful Answer

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Answered By Ana M, DVM

Veterinarian

Published on July 2nd, 2019

Thank you for submitting your question regarding Scooby. I recommend that he sees a veterinarian today. It is worrisome that he is vomiting so frequently. He will likely need fecal testing to determine if an intestinal infection is to blame. If not, diet could be the cause. Being so young and small, he will easily become dehydrated. I also worry about his blood sugar dropping too low from not eating regularly. I hope this information helps!

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    Answered By Ricardo Fernandez, DVM

    Veterinarian, Veterinary Oncology Resident

    Published on

    Thanks for using Petco Pet Education Center, formerly Petcoach! Loss of appetite can be observed with many conditions such as gastroenteritis, dietary indiscretion, kidney disease, pancreatitis, among many other possibilities. I recommend that you have Scooby evaluated by your veterinarian for further assessment and treatment. They would be able to check for these possibilities and others depending on the findings on exam. Treatment would be based on findings. Good luck and have a great day! Hoping for a speedy recovery! 

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