My 9mo old Doberman- German shepherd mix seems to be losing her hair. It started with two small bald spots but now all of her hair seems to be thinning. The hair near her rear end and on her stomach is thin to the point that you can see skin underneath without moving it. I took her to my local vet who gave us a shampoo and omega 3 fatty acid pills but after two weeks the hair loss continues to get worse. The only idea the vet gave was possibly chlorine from our pool had caused it but I would think that after two weeks of being away from the pool we would see improvement. PLEASE HELP! I am a first time pet owner and I am very worried!