Does anyone know why my Casey (a rough-coat)would have a very full, think coat in summer and then blow her coat just as cold weather hits? She's got a beautiful coat and is healthy, but seems to have gotten off cycle somehow. I read somewhere else that most borders blow their coats in spring and fall, but this timing doesn't make sense to me. The poor dog was miserably hot all summer with a full, thick undercoat and now it's gone for fall/winter. If it makes a difference, she spends most days outside, but comes in and out and sleeps indoors.