My tort isn't a hibernating species so I don't know anything about hibernation other than torts must not have food for a while before so that it doesn't rot in their gut, but you may find this thread useful and there is a link in one of the posts to another thread which Tom recommends.
Hello! I have a (4-6?) year old Russian tortoise who we are finally looking to hibernate this winter, after having had her for about a year and a half. We don't really know how old she is, but she's not a baby and she's still growing. Following some recommendations we've found here, we...