You could also try putting ferretone on your skin where your baby bites. I have a foot-biter and I tried everything. Bitter apple didn't work for long (as soon as it dried, he came back) and scruffing made him bite harder. So I started putting ferretone on my feet and now Rocky is more likely to lick than bite (except if I have socks on). It's worth a try. Good luck. Sharon & Rocky [Posted in FML issue 3807]