I used to feed my dogs rawhide chews they aren't unsafe to eat unless they plug them up, some are bleached with nasty stuff however. my male would unravel them and swallow them lol they don't digest so came out looking the same!! we switched to carrots believe it or not our three bullies love carrots. organic or not lol.
i do have some truly organic hide, we tanned it our selves! brain tanned wild elk and deer. sustainably sourced and ethically harvested. need any more buzz words lol.