My 18 month old has started biting. It hurts. The girl has a full set of teeth in there. When she was younger, taking her off, wetting her down, and waiting to resume nursing worked wonderfully. It's not working now. It's like she not really interested; she keeps getting distracted. She only nursing for a minute or so before she starts chewing. As far as I can tell, my supply is fine. I don't want to wean, but I can't take much more biting.