Welcome and welcome to your new baby....Time, there is no limit to how long it takes to work with a Grey, their a learning machine, and they can change from day to day. Quote:deal with it in a non-confrontational way,"Start your desired training, set your goals and work with him, he's testing you, suggestion, when he bites, say "no" calmly, walk away, walk back, do something like " Hi Baby, I love you' and touch him again...." Keep reading, your on a good start......