K.,
I am amazed that you haven't gotten any responses about not biting your son. I don't want to come off as harsh or judgmental, but that's like telling your child not to hit, and then walloping him upside the head! The only way to curb dangerous and unwanted bad behavior in children, is discipline, along with a loving explanation. I do believe controlled hand spanking has its place - when an immediate, serious consequence is needed - but biting should never, never be allowed. My children have always been immediately punished for biting or spitting. If your childcare is not doing a good enough job of curbing this behavior, perhaps you could take some time off work to spend a couple of weeks and working on this situation. Your child should first understand that biting or spitting is NEVER acceptable, and if he does, he will be immediately punished. I have always used time-outs, either facing a wall or alone in their room. If the behavior continues, I also take away favorite toys or privileges like TV, along with the time in their room. Then, once the child has calmed down, they MUST apologize sincerely to the person they hurt.
Good luck and God bless,
M. B