My yorkie is a year old now and he has just started this nibbbling phase. He mostly does it on my husband. He first started with his eyebrows, then his hair, and then the hair on his arms. Since then I have noticed he is nibbling the bed covers. He has only done it to me once or twice but he cannot seem to stop nibbling my husband. Could this become a compulsive thing? Just a little worried about my little man.