Hope someone can help, about three weeks ago I took my dog to be clipped and bathed.  After a while she started biting her back, near her tail and the inside of her legs.  So the next day I bathed her in plain water and I could smell a very medicated smell, so I thought that they hadnt rinsed off the shampoo.  Next day, her back was a miss, fur missing and red raw, so I bathed her again.  Then I got a buster collar, which was great, kept it on for about a week while her back cleared up, but every time I take it off, she is still biting it.  Bathed her with mild shampoo today and slightly better, but still having a go, so collar back on.  I dont really want to have  to pay for the vets, does anyone know anything that I could buy that might stop this?

TIA

Claire