I have posted here in the past and you guys have helped me out greatly before,

I have a 7 year old grey squirrel that we've raised from birth. Recently noticed he is missing his two front teeth. He has not damaged his front teeth in any way. From what I've noticed there's no infection, but I don't see any signs of other teeth growing back. He has recently seemed very lazy recently. He cannot eat his nuts, but he is eating. I have fed him soft foods recently, such as cucumber and lettuce and apples. I'm just looking for some help.

What could the problem be? Will his teeth grow back? Is his behavior related to his missing teeth?

Thank you guys for the help - his name is Chester.