I have what at first appeared to be a sick CX in a brooder of mixed breeds . I went to town and bought several things , including medicated feed , water soluable vitamins/electrlytes , and wood shavings because I was tired of replacing straw so often . Shortly after changing out everything I went back to observe them . One CX was obviously having a seizure , and while I stared at it in dumbfounded disbelief , another dropped and joined it . Then an EE followed suit .......... and I realized the two CX were doing a clumzy version of a dust bath in the new shavings . Further observation also made me decide the " sick " CX is actually nursing an injured leg . Its one of the smaller ones and I think it isn't breaking down but suffering from being ran over by a bigger one .