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					Originally Posted by kikil  she does nippy but at time it does hurt when she goes after my feet more then anyone else in the house. but at night sometime she seem to come more alive for some reason and try to go for mom but she don't really bit or nippy at at her feet like she does mine. I say no and that don't work and we do time out and that don't work to good either. at first we thought it was working but nope it's not doing that. she think it fun to go after my feet. sometime she think she bening senaking and I try to get her before she go after them. but that don't work to good either. | 
 
  My Yorkie is a bit of a biter too who comes alive at night. 

 LOL!! I blame it on my husband for letting him bite him when they play.  
I work with him all the time and only play games where I'm not dangling my hand in his face (fetch). It might help to run him tired at night by walking him, playing games, etc. Try to avoid games like tug of war and teach him to "drop". If he continues to bite you while you are trying to sleep then you should crate him unitl he can learn the difference between play time and bed time. Good luck!! This is an ongoing struggle for me so I feel your pain!