sorry to hear that mate,cant be 100% ,but what you described sounds like adrenalin disease.bad news is if it is there is no cure for it.can be fatal,not much of a consolation 1 of my gills is on its 3rd year with it,and another its second.look bloody awfull through the summer but shape up ok come the autumn.my mate had 1 for 5 year totally bald except for head and tail,moulted out in the fifth autumn,looked spot on.hope you get sorted.