there is a very slight risk to feeding raw bones, yes. Probably less than the risk of dogs choking to death on kibble (yes, sometimes they do this), bloating due to a dry kibble diet (yes, bloat is a common cause of dog deaths, and dry kibble diets dramatically increase the risk of a dog bloating), or getting rawhide or nylabones or toys lodged in their guts (yes, dogs need surgery/ die from swallowed toys and all sorts of so-called “safe” chews. They are dogs. Their motto is “eat it now and see if it’s edible later”). I had a surgical vet tech tell me once they seemed to make their living removing tampons and socks from the guts of dogs.
And the health benefit from the clean teeth far outweighs any health risk from eating the raw meat/ bones.
Although sometimes I’ve wondered if one could totally eliminate the risk and keep the benefits by buying large boneless cuts of meat and searing the outside with high heat- kill the bacteria, no bones, the dog still has to chew the meat thus cleaning the teeth. You’d have to find a way to give the dog sufficient calcium of course, plus feeding large chunks of boneless meat would probably be quite expensive. But I am now speculating and am off topic.
A dog’s normal way of eating raw meat is to rip off swallowable pieces and then swallow them whole. The stomach acid turns it into goop- yes, raw bones soaked in stomach acid will get soft and rubbery- and then it gets passed on to the intestines. If it can’t be properly gooped up in the stomach, most dogs will vomit it up later. Thus in the “normal” dog, if you give them a bone that can’t be digested, you’ll find it urped up in your shoe at 2 am, not stuck inside your dog killing your dog.
Anyway, note the “Swallowable pieces” part of above. My great dane was perfectly capable of swallowing an entire small chicken or rabbit whole after giving it one or two crunches in his huge jaws, and did so on more than one occasion, and digested the entire animal, no problems. I’ve noted that after dogs get more used to being fed raw, they tend to chew a bit more rather than gulping, but gulping is a normal way of eating for dogs. Note that swallowing large chunks of meat has been proven to be very protective against bloat. Some people who are going for “tooth cleaning” do fun things like hang on to the end of the chicken wing and make the dog chew more instead of just swallowing it.