D.M.
Ok ladies... this is going to sound bad but it worked for me and I have spoke to others who it worked for as well. (last resort if talking and other punishment doesn't work)
Again, this may be a little "backwood" but it worked. lol
The problem is they know it's bad but I don't think at 17mths they realize they are actually hurting someone when they bite. When my daughter began to start trying this out as a way to deal with frustration I was at a loss as well but I finally decided one day to show her exactly what it felt like and I bit her little finger hard enough for her to see, it doesn't feel good. When she looked at me all crazy and started giving the I think I might cry look... I said "BITE, OUCH... it hurts don't BITE" Next time she bit me, I did it again. It only took twice of her seeing that if she bites someone, she could get bit back and it hurts! I never had a problem with that again! lol
Sounds bad, but it worked!