Mites are very commons, Symptoms include quill loss, scratching, dry flaky skin, and tattered ears. Mite infestations can lead to red inflamed skin, open sores, blindness, ear infections and death. See your vet for mite treatments. Wash and disinfect cages, wheels, etc. Remove any wood products (hidey logs, etc) from the hedgehogs cage, these products are nearly impossible to disinfect, and can harbor mites and their eggs. One method to help determine if there are mites present, place your hedgehog on a black cloth and gently rub its quills. Next place the cloth under a bright light and look for white dots that are moving about. If you see movement then your hedgehog has mites.