Hi Guest
There are various methods of dealing with this problem on the Advice to new owners, Mouthing and Biting thread which may help you
Copy and paste the following into the address bar and it should take you there:
http://www.champdogsforum.co.uk/cgi-bin/board/topic_show.pl?pid=91481;hlm=and;hl=mouthing#91481
Good luck
Christine