When you have a group of Greyhounds together, especially unfamiliar ones, it is advisable to muzzle them to prevent accidental bites. (gpa-nw.org)
Once the puppy learns non-contact games, you may have an ace of spade kept for accidental biting: keep a tug toy near and should he put his teeth on you, reveal the toy and he'll instantly switch to it. (snowyswan.com)