Last week I bought (sort of unplanned) a hen with her two chicks which are now 3-4 weeks old. I've never had baby chicks before and the shop where I usually buy layer feed for my other hens doesn't have special feed for chicks. Until I've located a new source to get chick feed, what can I give them? So far, they've been eating layer feed but I read that that's not good for them because of too much calcium. How can I improvise? Should I give them and their mother rolled oats and wheat? Bread and vegetables? I'll try to get proper chick feed, but it might be another week or two until then.