Took Mr Fat Cat in for his yearly check today and was told that he has quite bad gingivitis
He is around 3.5 years old.
I've been sent away with some beef toothpaste, a toothbrush, some powder to sprinkle on his food, an appointment for dental treatment in 10 days time and a huge guilty conscience. I hope he won't need any gnashers removed. I had no idea you were supposed to brush cat teeth?! 
Wet food has now been banned.
He doesn't appear to be in any pain. He eats well, doesn't drool or paw at his mouth. He does have bad breath though.
Please help me feel like less of a terrible cat parent.