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The petroleum jelly works as a lubricant on the digestive tract and will make it easier for the cat to cough up or vomit the fur ball. You can add petroleum jelly to your petâs food. Add Â½ tbsp of petroleum jelly to the catâs food, once per day until the cat eliminates the hairball. Vaseline in excess may cause diarrhea. Petroleum jelly contains mineral oil, which should be given with caution to cats, as the mineral oil will drastically reduce your petâs vitamin A deposits.
The dermatologists who were consulted recommended petroleum jelly (aka Vaseline) as a good choice because it contains no additives, no preservatives and no fragrances, all of which can sometimes be irritants. In response, Rich from Sparks wrote asking if this petroleum product is actually toxic.