I have 6 hens that are a little over a year old now and on two of them I have notice they have bare spots that look like someone else has been pecking at them? People are trying to tell me it is due to mixing scratch and crack corn in their food, is this true and if so why? I got some spray at family, farm, & home yesterday and sprayed the two so that it would stop, but do I still need to remove them from the flock? I don't have any space to put them though is the problem. Please tell me what your thoughts are on this whole matter, I am really freaking out.