[GuinnessStout]

I can only speak for myself but with both of mine I have had to fix biting hard by making a yelp noise like mom would then biting them on the scruff of the neck like mom would.... Yes I know it sounds stupid and crazy but Guinness is great now and will play bite but when he does his teeth ever so lightly tap your skin and he growls his big bad mean dog way and that is all..... So not saying it works for everybody but it did for us.