I have a 1 yr old Sheltie who seems to be losing more and more hair. I brush her regularly but she has no undercoat on her belly or sides. She has a big ruff and a fluffy backside but I find that she has very little hair everywhere else. Am I doing something wrong or is it just the time of year? I feel like she had more hair when she was younger. She lives in an apartment but spends time outside? Is it just too warm? Her coat feels healthy but I dont know what's going on. Any help would be great! Thanks!