I give all mine (adults and puppys) cooked Beef Bones from our meals, and don't DARE miss giving a little to each of them. I do a quick wash, just to get the spices off. Then pick the bones up when they chew them down "near" where they could be swallowed whole. Also, I break off any slim protrusions on a bone (like a T-Bone) where they won't bite off a larger piece and swallow it.
I have never had a problem with one breaking a tooth while chewing a bone, and feel that any bone fragments or Bacteria which may linger on one, is well within their capacity to deal with, and actually integral to their digestive system. Allowing puppies to chew hard materials like bones, expedite "baby" tooth removal. They swallow those (teeth) all the time, and we rarely hear of any complications due to that.
I won't say that there is absolutely no need to worry about being contaminated via a "kiss", but, I allow it, and never have become sick because of that. There are maybe a dozen or so Zoonotic diseases which could be transferred, but, symptoms of those would be obvious in the animal, and appropriate actions/restrictions taken.
The way that we administer Health Care to our little guys, is usually so intensive, that a really bad infection/condition is SO unlikely, and, if I were not to allow my guys to "kiss" me vigorously (specially My Feale Becca) I think they would just roll over and die.
