When should the hedgehog in care hibernate?
When a hedgehog in care reaches hibernation weight either just before winter sets in or later on,
you must wait until Spring to release him. You should give a healthy animal the chance to hibernate,
even when he is being over-wintered in the house, as this is his natural behaviour.
A young hedgehog should weigh from 600-700g to hibernate in care. An adult animal,
depending on its age and size, should weigh between 1000g and 1400g before hibernation.
Housing for hibernation
The hedgehog should be kept in a warm room while he is being nursed back to health and is gaining weight.
He should be kept at a colder temperature during hibernation so that he can go into deep hibernation.
The ambient temperature should be as near to the outside temperature as possible. At room temperatures
of more than 6 degrees hedgehogs fall into a debilitating "shallow torpor", when they can neither eat nor
hibernate. So you should avoid putting him anywhere in direct sunlight (south facing).
Put the hedgehog
enclosure in a very cold room, on a balcony, on the terrace, in a garden chalet, or build an outdoor enclosure
in the garden. Cellars are usually not suitable because they are too warm.
Nestbox for hibernation
The small nest box you have been using up to now, should be put inside another, bigger cardboard box,
or better still a nestbox (about 40cm long) made of wood or chipboard. Insulate all round the small
nest box including underneath and on top with lots of crumpled up newspaper. Please don't use any polystyrene
to insulate the winter nest box (and/or the enclosure)! As this material is not breathable condensation will form
and the inside of the nest box will become damp. Remember to cut or saw an entrance hole in the outer box
corresponding with the entrance in the small nest box.
How long should food be put in the winter quarters?
When you have put the hedgehog in his winter quarters, continue to give him food until he does not
touch it any more. It can sometimes take days or weeks until he hibernates and you must go on cleaning
out the run and nest box as before.
If a hedgehog absolutely will not hibernate, take away all food for 3 days but leave fresh water for him.
As lack of food is one of the catalysts for hibernation, almost all healthy hedgehogs will then go into
hibernation. Without fail, you must always leave an "emergency ration" of dry hedgehog or cat food and
fresh water in the enclosure
Checking the hibernator
When the hedgehog has apparently gone into hibernation, stick a piece of toilet paper with 2 pieces of
sticky tape over the entrance hole. Then you will be able to tell at a glance, without touching the nest box,
whether the animal has woken up and has left his nest box at night or whether he is still asleep.
If you are worried because you haven't seen the hedgehog for a long time, you can look into the nest box
carefully. A hibernating hedgehog is so tightly rolled up that you can only see his spines. If you touch him,
they will bristle up in slow motion. If the hedgehog is dead you will usually see its head and feet.
Waking up and preparation for release
When the hedgehog wakes up from hibernation (usually end of March to mid-April) he will have lost a
lot of weight. If he were to be released at this time of year, he would not find much food. Moreover,
he would have no winter nest in the wild, where he could retreat if there were sudden frosts again.
So he must be well fed until he has gained the weight he lost during hibernation. That will take 2 or 3 weeks.
Then it's back into the wild! Read more about this under
Release a hedgehog which has been in care.