My 3 yr old ND doe seems to be losing hair on her rump. When I look at it i see lots of dandruff and dry skin. She is eating hay but is off her feed which is normal for her at this time since it is her heat cycle. But she is shivering a lot because of the hair loss and i'm noticing it thin out in other areas. Could it be mites? I would think it would be too cold but i'm not sure. I attaching pics of her rump area.