No, losing hair is not normal. It could be a sign of adrenal disease which is common in ferrets. Male ferrets it tends to be more of a problem for, other issues come to play such as prostate problems. Female ferrets on the other can have hair loss which is a hormonal issue and usually the females hair will go back. The same can happen with males, but as I mentioned they have bigger issues with this disease. If you notice hair loss at the base of the tail, or on the paws these can be signs of adrenal. Need to locate a vet the is educated on ferrets, which sometimes can be a challenge. Usually if the animal is diagnosed with adrenal surgery is recommended. There is a shot treatment as well, my experience is that the surgery is the best way to go. But of course always consult your vet. Research online is always helpful too, there are some wonderful ferret website with some valuable information on all aspects of the wonderful animals. I have 4 of them!!! Good luck
