Hi everyone, I'm new to chickens and enjoying my new flock of 4 hens (and 6 chicks). I have a question (and a vent): While I was at work today, my FIL came over and fed my chickens MOLDY bread. Like, seriously moldy. As in, you couldn't even tell it was bread because the only colour on it was DARK BLUE. Words can't do justice. I am LIVID!! I picked out what was left in the run, which were 2 half eaten slices and a few bites.. out of 3 or 4 slices, apparently. What signs of illness do I need to watch out for? I am so new to chickens that I am worried I won't know they are sick. Thanks in advance!