I have a 3 almost 4 year old Hermanns tortoise. For the past few months he has been sleeping constantly. The only time he becomes alert is when I physically wake him up and soak him and then he will bask for maybe 10 mins eat a tiny amount of food and go straight back into the part of his enclosure where he sleeps. I took him to the vet a few months back as this was happening and he perked up for maybe a couple weeks then was straight back to how he was before. I give calcium powder on his food. I have checked temps and they’re all fine, he has a uvb bulb and heat lamp. I was possibly wondering if he’s maybe trying to hibernate, not sure how that all works to be honest but it’s the only possibility I can think of as I have tried everything. He used to be very active and was constantly out and coming over to you and was a great eater but he has barely eating anything for a while now and I’m getting worried again. Going to take him back to the vet soon but just looking for advice in the meantime. Thanks.