If you are giving your raisins to smaller chicks, it might be best to soak and chop them. A whole raisin will swell from the moisture in the digestive system. I would be concerned about a big raisin getting stuck and souring. Didn't much think about crops in chicks, until I got Naked Necks, and these babies crops are not covered by feathers, so they are a fleshy bulge, very evident and they fill so quickly. I will feed grit before giving them treats.
