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Why is my senior dog having persistent diarrhea after diet change?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | spayed | 11 years and 5 months old | 50 lbs

My 11year old dog has got persistent diarrhoea.she used to have trouble keeping on weigh so she has been fed tux energy biscuits (for working dogs) they are very high in fat.recently she has become obese, so I cut down the amount of biscuits fed.she appears to have no other symptoms.no blood or mucus passed and not black in colour.normal appetite.

1 Answer

Most Helpful Answer

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Answered By Emily, DVM

Veterinarian

Published on June 24th, 2017

Honey's diarrhea could be due to food intolerance/sensitivity, chronic parasites like Giardia, IBD or even something in her small intestine like a pancreas issue. Most of these potential causes requires some type of lab test to diagnose so I recommend she be examined by her veterinarian. Sometimes a diet change is needed, other times medication.

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