Why Is My Cat Drooling When Purring. Some household cleaning products, ingested directly or licked off the fur, as well as some houseplants may burn the lining of the mouth and cause drooling. You’ll also notice a cat drooling when it is sound asleep.
This is a really good idea when brushing especially as it will catch falling hairs as well as dribble. Common plants like tulips, azaleas, and chrysanthemums can make your cat drool, as well as make them sick, so don't let your feline friend eat them. Usually, they drool when they’re purring or kneading.
In most cases, a little drool from your feline is nothing to worry about.
Cat drooling when purring is usually a happy sign. “if the cat starts drooling during a stressful event—like if you have a house party—and then stops and is acting fine, you should keep an eye on her, but she’s likely ok,” mcgonigle says. Drooling in these situations is a physiological (normal) response to feeling relaxed and is nothing to worry about. As a result, your cat will stop drooling as soon as the toxins are out of its system.