I too have a blue nose name Blue. He was a stud too...but unfortunately it wasn't stud tail that caused his hair loss on his tail. It turned out to be Cushings disease. The hair loss started about 1 1/2 years ago. We thought it was just old age (bald spot) as he was about 9 going on 10 years old at that time. But the real symptoms didn't kick in until fall 2010. Urinary tract infections, urine leakage (even after the infection cleared up), weight loss, skin infection. We found out after our vet finally referred us to a specialist about 3 months ago. After a skin biopsy and medication...Blue has gotten ALL his hair back including the spot on his tail which we intitially thought was due to old age. We're still working on the weight gain but afterall it took about a year for this disease to break him down slowly. So my guess is that it will take sometime to get him all the way back 100%. But he's perked back up to his old self again. Please do your research and stay on top of your vet. I hope it is just "stud tail" for your Blue. Good luck.