My two year old is biting my neices when they have food or just what ever he wants. I try giving him the same thing the have but it doesn't work. Just recently he bite both girls for no reason at all. Just to bite. What do I do. I have tried them biting him back but that is not working. I have also tried putting him in time out and popping his rear a little and telling him no. None of this is working and I'm at my breaking point. Please help.:(