Q&A: Vet told me to give my cat hairball treatment, the main ingredient is petroleum jelly. Can this cause diarrhea?

Question by Sunny: Vet told me to give my cat hairball treatment, the main ingredient is petroleum jelly. Can this cause diarrhea?
I’ve been giving it to her 2 times a week like the vet said, to help with her hairballs, and I noticed today there was diarrhea in her litter box. Could that be caused by the petroleum jelly?

Best answer:

Answer by Bozema
Yep, it greases them up a bit but it also gets the hairballs to pass.

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