Hi Folks Following a run of fleas which have been treated with Advantage, some of my ferrets are losing hair (thinning) on the shoulders, back of the head, and down the back. There is light redness. No scratching of the area. Any ideas e.g. allergy etc. Have had a black light passed over some of them for ringworm nothing showed to indicate this. This has shown on several so I don't think it is adrenal. Some are young eg 5 months and a few are up to 3 years old We have also had hot humid weather in the last few weeks tho this has since cooled off. Thanks for any help Michelle [Posted in FML 6276]