why do cats drool when you pet them

Cats drool when petted mostly because they feel relaxed, happy, and content. This drooling is linked to the release of endorphins, the feel-good hormones, which cause their mouth muscles to relax and stimulate saliva production. The behavior can be traced back to kittenhood nursing when they felt comfort and security, and it often accompanies other signs of contentment like purring, kneading, and relaxed body posture. However, excessive drooling or drooling accompanied by other symptoms could indicate health issues like dental disease or stress, which may warrant a vet checkup.