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My senior Chihuahua has bloody stool, eats, but isn't gaining weight.

Updated On September 23rd, 2025

Pet's info: Dog | Chihuahua | Female | 3 lbs

Why is my older Chihuahua having bloody stool with mucus and eats but will not gain much weight

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3 Answers

Most Helpful Answer

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Answered By Jeffrey Milner

Veterinarian

Published on April 28th, 2017

Based on what you seeing, having a fecal sample brought in to your veterinarian for analysis would be a great plan. He or she will be able to tell you if there are any intestinal parasites present. This is one of the most common reasons for blood in the stool, and weight loss despite a normal appetite. If you can not get to the veterinarian, treatment with a dewormer and/or drug to kill coccidia might be warranted. These can be obtained at most pet stores or tractor supply.

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on

    What a little cutie Maddy is, but I'm sorry she isn't doing well! It could be that she is suffering from colitis which is an inflammation of the colon and large intestine that causes bloody stool. It could also be something more serious such as a GI tumor leading to the bloody stool and losing weight. It's quite serious she has these combination of symptoms, and Maddy needs to see a vet as soon as possible for a physical exam, geriatric blood panel, and urinalysis. The vet can diagnose what is causing her symptoms and can discuss treatment options with you. Please bring her into a vet right away.

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    Answered By Jessica Desrosiers

    Veterinary Technician

    Published on January 11th, 2018

    It's possible Louie may have some internal parasites going on, GI issues, or even an underlying metabolic issue causing him to be more hungry and have bloody stools, especially since he is a senior dog. It would be best to seek out veterinary care for a complete exam along with bloodwork and a fecal exam (you can bring in a sample with you to his appointment). This can help look for common issues such as parasites, GI problems and metabolic issues causing his change in appetite and bloody stool so that you can treat them accordingly.

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