My nearly 5 year old male Siamese has just started drooling today when on my knee. He's never done this before and is generally very aloof and doesn't really show affection much. He only purrs very rarely, only for me too. He doesn't knead with his paws at all, unlike my other cat.
I'm worried this is a sign of illness. He's due a vet visit for his booster in the next 2 weeks anyway, but wondered if anyone experienced anything similar?
The only thing different is that my other cat caught 2 sparrows today, could that set the Siamese off salivating?
Also a couple of days ago he came in with a tiny patch of what looked like oil on his head, suspect he'd been sat under a car. Could that cause him to drool? It's on his head, so he can't lick it off.