Ah, shedding season begins as the days get longer, easiest to see on most black horses and roans. As the hairs begin to loosen up they'll loose some of the pigment, black hairs turn brown and roans turn grey. My 2 blacks have been turning for a couple weeks now, not really dropping any hair but it's getting ready to.
My dog, on the other hand, has been shedding in full. Double coated Boarder Collie mix, her hair is coming out by the handfulls.