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Why is my dog not eating, losing weight, and throwing up bile?

Updated On September 23rd, 2025

Pet's info: Dog | Border Collie | Female | spayed | 10 months and 2 days old

I have a one year old border collie. She is not putting on any weight and refuses to eat all her food and will eat barely half a cup of food a day. And I try to feed her a cup of food twice a day. Also she has started vomiting in the middle of the night or early hours of the morning, which is just bile and never any food. What do you think I should do?

1 Answer

Most Helpful Answer

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Answered By Ana M, DVM

Veterinarian

Published on May 26th, 2018

Thank you for submitting your question regarding Lily. I would recommend that she sees her veterinarian for some testing. She will likely need blood work and a urinalysis to start. She may require x-rays of her abdomen and fecal testing as well. She is likely not eating as her belly hurts from gastrointestinal upset. Some dogs who go long periods in between meals will vomit as a result of the acid building up in the stomach. This may be the cause of her vomiting, but still does not explain her decreased appetite. Offer her small frequent meals in the meantime to encourage her to eat. I hope this information helps!

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