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

Updated On September 23rd, 2025

Pet's info: Dog | Bulldog | Female

My dog is throwing up blood, lost her appetite and isn't drinking and has lost lots of weight. What should I do? What would the vets do? What could possibly be wrong?

2 Answers

Most Helpful Answer

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Answered By David Darvishian

Veterinarian

Published on August 8th, 2017

Hi and thanks for using Petco Pet Education Center, formerly Petcoach! Sorry to hear about Luna. Any blood loss should be evaluated immediately by your veterinarian. The causes are many including toxins (rat poison), a dietary problem, irritants, foreign bodies, infections by viruses/bacteria, or other reasons that impair the blood clotting system. Some autoimmune diseases and tick borne diseases come to mind also. Only your vet can assess and run the appropriate tests to determine what is going on. Normally after an exam the following can be advised - blood coagulation studies, standard blood tests, fecal exam, x-rays/ultrasound, etc. Treatment of course depends on the cause determined. Get Luna seen as soon as possible and Good Luck.

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    Answered By Stephanie Echols, DVM

    Veterinarian

    Published on

    I'm sorry to hear Luna isn't feeling well. It sounds like she could have an ulcer in her stomach but without seeing her, it is hard to say. I recommend you take her to a vet right away. They will probably want to start with some blood work and X-rays. Please bring a list of any medications she's on. They may want to keep her in the hospital on IV fluids but the tests will help determine what she needs. Good luck and kisses to Luna!

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