Ryle: I agree with you!! I've also heard that the reason they can go bald so fast is because their new coat can't keep up and since they're losing their winter coats so fast they still have to grow their summer coat. Is this true?
In either case, My mare is kinda doing the same thing, just not as bad. I stopped using the shedding blade, and just resorted to the curry comb with a stiff bristle brush. The only place I still use the shedding blade is on her hind end, she's got plenty of loose hair still left on there.