Ive had sheep that were NOT dyed in a fenced in open air area that did not have this same effect. Once I dyed the sheep light blue (8+ sheep) died. No storm no broken gate no wolves in the fenced area. The first time the sheep disappeared with no trace. And it was again 8+ light blue sheep. The second time I came back up and their was only 3 wool and 3 of the meat on the ground and all were sheep were gone.