Shedding

[Halcyon]

How do you Coonies shed and when? One of the owners of Norwegian Forest cattery told me that Norwegian cats shed very fast and in large quantities while Maincoons loose their coat gradually by small amounts at a time. This is the first year I have my kitties, and one of them shed like a snake in 1 week in August. I became concerned ant took her to the vet. $400 later, when all her tests turned out to be normal, I still had no answer to why she shed so fast. If it was a seasonal change, it should happen in spring or at least in the beginning of summer, and her sister would also be affected. I am aware that hair loss in cats can have million reasons, but want to know the common trend of shedding in your cats.