Were you asking about "play biting?" If you were, I used a sharp "eeek" when ever mine try biting. Others have mentioned using a soda bottle with coins in it. (My dogs stop everything when I shake one of those.

) Others have suggested having a chew toy close by and put it into their mouths. You do have a very young one there so I suppose it will take a lot of training and patience. There is a "search" button at the top of each page. That may help you.
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Joanne

Eli

Chipper

Eva

Snowboy

Rosie(R.I.P. 1996-July 29, 2013)

Cocoa(R.I.P 1998-April 26, 2012):