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My cat has black runny stool. Could litter products be the cause?

Updated on September 23, 2025

Pet's info: Cat | Domestic Longhair | Male | neutered | 5 years and 4 months old

Yesterday and today Choo Choo had black, runny stools. Normally they're brown and firm. We've recently been using Dr. Elsey's Cat Attract Litter Additive because one of our other cats isn't consistent with using the litter boxes. We've been using Nature's Miracle 3in1 Odor Destroyer as well. Any idea if either could be causing it or what else could be the problem?

1 Answer

Most Helpful Answer

Angel Alvarado, LVT

Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on August 24, 2018

It could be possible, but not likely. You can stop using then for a few days and see if the issue resolves, then resume use. If Choo Choo develops runny stool, then you'll know it was one of the 2 peoducts.
For now, withhold food for 8 to 12 hours, allowing small amounts of water or unflavored PediaLyte. Resume feeding a bland diet in small, frequent amounts until the stool is normal then transition slowly back to the regular diet.
See your veterinarian if Choo Choo becomes lethargic, vomits, stops eating or if the loose stool persists or worsens.
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