I had similar symptoms from a couple of birds after they got wet a few times, I gave them some extra vitamins for a few days and it really helped alot.. I followed CJR's method of putting 2 tablespoons of codliver oil on some multi-grain bread, cover it with another slice of bread (like making a sandwich), and I squish 'em together then take it out to the flock and give them equal ammounts... I gotta tell you though, that they go crazy for codliver oil sandwiches!! and after a few days will run to you when they see you!

I hope they get better!!