I have a 3 year old girl called Molly. Over the past year or so we've noticed a patch of fur on her lower back area (by her tail) becoming quite sparse. Quite recently, however, the fur loss has become very noticeable and the area has now become larger. It now covers her lower back and is starting to descend down each side, just above each back leg. I've done some research and lots of people talk about seasonal alopaecia or thyroid problems. She has a very healthy appetite, drinks well, sleeps well, and does not attempt to chew or scratch at these areas. She is approx 36kgs in weight, very muscular, very strong and is not overweight. She saw the vet recently when we discussed something else and the vet noticed the thinning of the fur. She didn't seem overly concerned but advised us to just keep an eye on it. Molly's beautiful glossy golden brindle coat is starting to look very sorry for itself and I'm really confused as to why she may be experiencing seasonal alopaecia and why it has suddenly started in her 3rd year for no reason. Also, if she does have any thyroid problems, what sort of symptoms should I be looking for? Can anyone help a puzzled mom?