I knew about the rawhide but not the bulls things. Thanks for helping me understand.

They are made from the “private part” of bulls, and are an alternative for rawhide type chews. I give them to my dogs instead of rawhide because dogs cannot digest rawhide, it just “passes through” the way that it is swallowed – which is okay if the dog chews the rawhide into small pieces but seems how dogs throats are bigger than their digestive tracks, dogs can swallow pieces that are too big to pass through so it creates a blockage and they have to have the rawhide surgically removed. My male dog tends to try to “inhale” his food, he tries to swallow as soon as possible – he often will try swallowing, gag, chew a tiny bit more, try again, gag again, chew a bit more, and then finally be successful at swallowing. So for him, rawhide would be really dangerous as he would almost certainly swallow pieces that are too big to pass through his digestive system.