Possibly a cross. We purchased her from TSC so not too sure if they are crossed or not.I think it is normal for chickens to have mood swings...my oldest girls are 16 months old and are molting and they are all very irritated at me and each other (it is painful for them to grow all of those new feathers in) that could also explain why she is not laying she could also be molting....not sure about the sounds they make mine do that also sometimes just be sure they do not have a rattling or wheezing sound and they should be fine...about dumplin is it possible they she could be a cornish cross (meat chicken) ?