I give mine raw hides all the time. They love them & have been eating them over 4 years with no problems at all. My dogs are big time chewers & are great about chewing them down until they are very soft & smaller peices, so I don't worry about them gulping down big chunks.
I mostly buy the pressed rawhide "sticks" that are about 10 inches long.
I also these excellent "retriever rolls" that are about 4 inches around & about 12 inches long & are flavored with natural vanilla oil.
I don't leave chews for them when I am not around, but we haven't had a single problem. Like I said though, my dogs aren't gulpers.