Why isn't your DCP taking care of this? You pay someone to protect your little one and if it isn't happening then you need to go elsewhere.
Agreed! I would talk to DS's teacher or the daycare director. Behavior like that, while normal, needs to be corrected. At my boys' Mother's Day Out program, the parent has to sign a form every time their kid bites someone, acknowledging that it happened and needs to be addressed.
I have two boys who are 13.5 months apart and when my oldest (just turned 2) behaves that way, he gets one warning (if the behavior isn't too bad), then a time out. Biting, pushing so hard that DS2 falls or any other physically aggressive behavior gets a time out with no warning.