Lately Dana's mane has been thinning A LOT. If I gently pull on her mane, I get a chunk/fist full of hair that comes out. It's kind of thin and sparse now and its shorter. She has no balding or anything on her actual coat by her mane, it's just the mane that's coming out. Why do you think this might be happening? Could it be that she's itchy because she's shedding out and she's rubbing her head on stuff? (she's never pulled her mane out before) I haven't put ANYTHING in her mane since last August when I gave her bath and used the same shampoo I always do and I never brush it, she's been pretty much untouched all winter. This just started a couple weeks ago. I'm so confused and I'm afraid she's going to pull her entire mane out and have nothing left.