stuffy nose and sleep drool

Hi All,
In the last few days, I've noticed Bogie sounding a little more congested than usual (he's been to the vet before for this and they have determined he's okay and just has allergies). I've also noticed he's drooling a little bit when he sleeps. He seems fine otherwise, eating and drinking a lot and having normal bathroom movements. Has anyone else had this with their cat? Should I be worried? Thanks.

It sounds as if it may be the congestion causing the drool. If they can't breath well from thier noses, they will breath through thier mouth. I would talk to your vet about something to help with the allergies when they are active. It will help alot!