Signs of hedgehogs in danger of being too cold are decreased activity, decreased appetite, sneezing (as opposed to puffling). So, if she's not on her wheel and exploring at night, eating her food and turning down mealworms and other treats, check the temperature in her enclosure!
Furthermore, hedgehogs are vulnerable to frostbite, even freezing, if their body temperature drops below 4C (39F); this is a significant danger if the temperature inside their nest falls below 1C (34F) and they may leave nests during very cold weather to avoid freezing to death.
Hedgehogs are sensitive to temperature changes. The ideal range is between 75°F and 85°F. However, they will tolerate temperatures between 72°F and 90°F.
If your hedgehog is acting sluggish, lethargic, uncoordinated or they are wobbly with the inability to move limbs; it may be a hibernation attempt. Some hedgehog owners fear the worst – Wobbly Hedgehog Syndrome – which is a definite death sentence. Between the two, you can determine hedgehog hibernation quite easily.
A hedgehog's go-to vocal is huffing and puffing, but he's not trying to blow the house down. This sniffing is a normal vocalization he makes while going about his business of exploring. An unhappy hedgehog, on the other hand, will show his disdain with a hiss or a clicking sound.
Many hedgehogs are busy and want to try to explore but a stressed hedgehog will be much more persistent and not easily distracted. The stressed hedgehog may also twitch or shake its head nervously. It is almost as if the hedgehog is saying “Sensory overload. I can't take it anymore.”
Like many pocket pets, hedgehogs love to explore mazes and tunnels. This will keep Hedgie active, and offer him mental stimulation. You can buy labyrinths, or make your own out of shoeboxes or PVC pipe. To make your pet's explorations even more fun for him, hide a snack at the end of the tunnel.
Hibernation can take place any time from October to April, but in a warmer winter you may still see hedgehogs out and about in December.
Hot water bottles work well to provide heat for many hours. Just make sure that it isn't too hot for you to hold. If it's too hot for you to hold, it's too hot for your hedgehog. If your hot water bottle doesn't already come in a cover, always wrap something around it.
Hedgehog heating pads are another great way to keep your hedgehog warm. You'll pretty much see owners split down the middle when it comes to pads vs lamps. The best way to use them is by placing them underneath half of the cage.
Hedgehogs need environmental temperatures between 70 and 80 degrees. Keep your hedgehog's cage away from drafts, direct sunlight, or cold areas. You may want to provide your hedgehog with a small warm spot in his cage where he can go to get warm but would also be able to get away from if he feels too warm.
On a brisk winter's day, a group of hedgehogs try to huddle together to conserve body heat. But as they get closer to each other, their quills prick each other causing them to have to separate.
A hedgehog lying flat who is cold and still is much more likely to be dead.
HEATSTROKE AND DEHYDRATION
If they are laying on their sides then it is very serious. Often seen in the summer months but also dehydration can be a problem in the winter months. Giving a hedgehog dried food, or any food when they are suffering from this condition can worsen the situation.
Hedgehogs are active during the night, so the best time to put out food is just after dusk, when they are starting to search for food. The Autumn and Winter months are the most important for them to find food to put on enough weight before hibernation, so always make sure you put out food at this time of year.
Our observations show that nesting Mums often leave their young ones to rest elsewhere. That rest is often through the first and last part of the night but can also be in the day time. Routinely we expect to see hedgehogs come out in the evening around 9.30pm and go back to bed by 5am.
Busy roads cause hedgehog deaths. New developments usually lack any hedgehog friendly features, though this is starting to change. Hibernation habitat being lost to over-management or development. Tidy gardens aren't good for 'hogs – they need log piles and areas of wild grass to feed and nest in.
The cage should be large enough to allow the hedgehog to move around. At least 2 x 3 feet (61 x 91cm) should be the minimum floor space provided. Walls must be high enough to prevent escape, as hedgehogs are good climbers. A glass aquarium or smooth-sided cage is a reasonable choice for many owners.
Hedgehogs naturally like to burrow, providing additional bedding gives them a more natural ability to make a bed inside their shelter. Many hedgehogs will sleep under their shelter as opposed to inside it. Providing 12x12 squares of fleece also make good sleeping material.
Should I try to keep them warm? Hedgehogs don't need to be warm to hibernate, in fact they drop their body temperature down to match the environmental temperature. This lets them save the energy they would have used on trying to keep warm. It also means they don't move around and eat as usual.
The average hedgehog is content to do its own thing and may not show any outward sign that it cares about its owner's existence unless you have a treat in your hand. Despite their somewhat solitary nature, they can become very affectionate with their owners and will even enjoy snuggling on your lap.
Depression. Without room, a hedgehog will show signs of depression, such as excessive sleeping, refusal to eat, repetitious behaviour, and self mutilation.
When hedgehogs get used to their owners especially their scent, giving them a belly rub is one way of showing them affection. Hedgehogs like belly rubs as it can put them at ease and it's best to give them a belly rub after some time and not when they have just woken up.