Just to let everyone know, even though a bunch of people and sites recommend tea tree oil, it is actually toxic for a hedgehog. My hedgehog was losing his spines and some of his fur, so I applied tea tree oil on the affected areas. He was fine the first day, but then the second, he went through a sort of paralysis, then a coma, and then he died on the third day. I later went on more sites and there have been similar cases with other people and their hedgehogs. DO NOT USE TEA TREE OIL!!!!!!!!