I saw him in the bin at the feed store and stood there for forever trying to figure out what color he'd be. He was the only one in the bin that looked like that. Then I said to myself "Self, you'd better take him home so you can figure out the answer".
I would call this guinea keet a pinto - with some pearl gray feathering, which is in essence a heavily pied pearl gray. I've never heard of "bad whites" or "chimera," so I don't know if those names would also apply. He is a beautiful bird! I don't blame you for taking him home, txchickie.