No, he doesn't have fleas. I've cheek for fleas and I don't see any. However, he did have fleas during the late summer months, so he could have got a parasite. And yes, his hair is coming off where the back ends and tail begins.
I think the parasite or dental care are good possibilities. Most likely, he probably has a parasite problem of some sort, I think, but either way, I think I need to take him to the vet to a check up.
Thank you for your suggestions! They really help!
I have another question.
Do they sell any dental care products for cats at pet stores? If so, which ones would you recommend if you have tried any on your cat?