Tortoise hibernate safely at a temperature of between no lower than 2 degrees and no higher than 6 degrees. If the temperature rises above this the tortoise will wake up and move around using up valuable energy saved up before run down.
Your tortoise will not be warm enough to eat and if not warmed up very soon will more than likely die. As they are cold blooded reptiles it takes 3 to 4 weeks to complete their run down, they have to clear their stomach/intestines and bladder of all waste as this will continue to rot while the tortoise sleeps, this is a slow process and tortoise know they have to do it.
Put your tortoise in a secure pen in your garden with a house so they have protection from weather and predators, put them in a box over night and bring them into your garage as if they do dig down over night you may not find them the next day and you will have to leave them until they wake in spring. Do this every day for at least 3 weeks.
If your tortoise just sleeps or is digging right into the ground then after 2 weeks you just might as well let them go into hibernation. After 3 weeks or at a time you are happy, get a plastic box and line the bottom with newspaper then fill it with shredded paper, put your tortoise in this box and put it into a cold garage or shed just off the floor to prevent the extreme cold penetrating through the box.
If the garage/shed gets too cold you can cover the box with tarpaulin/blanket/carpet or anything for protection. You can pick a tortoise up whilst hibernating this will not usually bother them as they will settle down as soon as you put them back. To check your tortoise is ok during hibernating touch the back leg, you should get a response, they will pull the back leg in or even hiss this is normal and you will know it is alive, next check the nose for mucus or wetness, check the eyes are still closed and not weeping and also check there is no wetness around the back end of your tortoise, if after the check you find anything you are not happy with then dont risk leaving your tortoise any longer wake and warm immediately
Your tortoise will usually wake when the temperature is warmer but if you are happy they have been in hibernation long enough you can wake them yourself. Put your heat lamp on in the vivarium put your tortoise in at the cold end, as they wake they will move towards the heat, when awake offer food this may take a few days before they eat but don’t worry. Give them a bath in warm water this also helps.
there is always a risk during hibernation, you can not see inside a tortoise so have to keep a close eye and dont just leave until spring. Trust your instinct if you are not happy or think there is something not right Get them up.
Do not attempt to hibernate your tortoise if it has a body mass under 0.19 this will be dangerous and may result in your tortoise loosing their life.
Body mass is length cubed the weight is then divided into the cubed length
Example body mass index = length in centimetres 10.5 x 10.5 x 10.5 = 1157.625 weight in grams 270g.
270g divided by 1157.625 = 0.23 this is the BMI.
As usual, and I find this very distressing, the most tortoise injuries we see are from dog attack. It is not just the very severe bites, but it is the shaking that the dog does whilst attacking the tortoise that causes the damage. Very few survive, and I constantly warn people to beware of this (even the best tempered dog can do this). Please remember it is illegal to keep an animal in close proximity to a predator and prosecutions could arise.
Other incidents occurring all too frequently basically boil down to bad animal husbandry. Just because the tortoise is out in the garden this does not necessarily mean it is thriving. Weigh your tortoise regularly and bathe it often to keep fly strike away. Check eyes, mouth and cloaca regularly and don’t keep different species together. Stress constitutes ill health —Make sure a male tortoise does not bother the female unduly and always provide egg laying facilities. Tortoise should not be kept on patios or concrete without access to grass or indoors permanently. It is sad to see tortoise shut in vivariums constantly in flats or houses without grass access this according to the new law is illegal.
Vivariums— although excellent if used properly, we are seeing deaths through the tortoise flipping over under the lights or accelerated growth and ridges through being in a vivarium constantly without grass or fresh air access.
Chest infections and runny nose increases at the end of summer before hibernation, and if a tortoise is put into hibernation with either could mean death. As the tortoise comes out of hibernation , this is the time to use your back-up system of heat/light and uvb. If left out in our so called “spring’’ days cold weather could kill.