Hey all, hope your well, both my babies have black on their tongues but only in the centre where the papillae is and it does vary in amount and comes and goes. The vet has said for us to look for something around the house that they have been licking or chewing but can’t really find anything and haven’t seen them chewing anything much, they both seem happy and healthy other than this, I wonder if it is some kind of fibres from fabrics or from where they are cleaning each other as have tried to do a bit of reasearch already and these are suggestions I have found, or maybe it’s just food? And i am being overly worried? Does anyone else have any idea????! Never noticed it with other cats I have had in the past, Thank you!