Hedgehogs are sensitive to cold temperatures, and exposure to extreme cold can lead to several health issues. If a hedgehog gets too cold, it may enter a state of hibernation or torpor, which is a temporary hibernation-like state. While this can be a natural response to cold, if the temperature is too low for an extended period, it can be dangerous.

Here are some potential effects:
1. **Hypothermia**: Prolonged exposure to cold can result in hypothermia, where the hedgehog's body temperature drops to dangerous levels. Symptoms include lethargy, weakness, and a lack of responsiveness.

2. **Dehydration**: Cold weather can lead to dehydration, especially if the hedgehog is not able to access water. Make sure to provide fresh water at all times.

3. **Reduced Immune Function**: Cold stress can weaken a hedgehog's immune system, making them more susceptible to diseases and infections.

4. **Metabolic Issues**: Cold temperatures can slow down a hedgehog's metabolism, affecting their ability to digest food properly, which can lead to weight loss and other health problems.

To prevent your hedgehog from getting too cold, ensure their habitat is kept at a warm and stable temperature, ideally between 75°F to 80°F (24°C to 27°C). Use heating pads designed for small animals, and provide plenty of bedding for insulation. If you suspect your hedgehog is too cold, gently warm them up gradually and consult a veterinarian if they show signs of distress or illness.

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Topics covered in this question:

Hedgehog Care Health Issues Temperature Control Hibernation Cold Weather