The chickens are currently working their way through a bag of purina all flock, but that comes in pellet form, and I didn't want to risk the choking hazard. I do have a big unopened bag of laying crumble on standby, but I was worried about the calcium content you mentioned.
I suppose one...
I have 5 four week old muscovy ducklings I'm currently raising. I fed them the last of their duckling crumbles today and didn't get a chance to run by the store to get more like I intended (a crisis came up in the chicken coop). So... I put together a quick batch of something to hold them over...