Bathing, Dandruff and concerns?

My pigs, bless them, were in need of a bath. I'd had them since October, and they were becoming smelly little girls. So, being a dutiful mother, I bathed them. They were dried completely and then stuck back into their cage (I bathed them seperately so that I could properly dry them both without having to worry). They survived the bath and blow drier fine (they're so brave), but now Sushi my little black and cream girl has quite a bit of dandruff. She's had a couple flakes now and then, but nothing to this extreme. Could this just be dry skin caused by the bath?
Fugu my other girl has no signs of dandruff, so is it possible that Sushis just more sensative then Fugu is to bathing?
Lethbridge (where I live) has a very dry climate so could that also be a cause? I'm just concerned.