Thanks for all your advice. I thought of rain scald, but as she's been rugged ruled it out. I only removed a couple of scabs because I was checking for 'little visitors', but ruled that out too!
She may well have got a bit warm under the rug, this weather is s unpredictable and it's not...
Hi
I have recently bought a (coloured) mare, whose back, quarters and shoulders are covered in scabs, some of which are quite large. She lives out and is rugged. We have removed a couple of the smaller ones, and hair comes off with them and the skin is pink, flakey and sore looking underneath...