My son bit twice around that age. I pulled him in and firmly said "no, bite". It was enough for him to break his latch. After his latch was broken I put him down for a couple minutes and then tried again if he showed he was still hungry. My daughter has just started biting while teething here at 7 months and I have done the same with her. So far it has helped with her clamping down and I'm hopeful it will be established that biting isn't tolerated before her teeth appear.
Momma to S ('09) and A ('10)