There are many reasons why a Dobe may be losing hair. One is definitely allergies, which is treatable and most of the time only temporary. I'm talking about the condition where they (most always Blues and fawns) start to lose hair, and the skin sort of begins to look blistery, then eventually, the skin gets a calloused look and feel--it's a blood disorder, or genetic disorder or something. Our blue female began showing signs of the condition at approx 1 yr old, and we did all kinds of treatments, vet visits, everything we could think of to do, but it progressed to the point that she got deathly sick, and eventually died. It was horrible. I still would like to know more about it, though. I think only a small percentage of Dobermans are affected by it. So many things to worry about when you love your dogs.