I need some help with a reoccuring issue we are having with our GPOs. The last animal we had died shortly(within weeks) of getting this quarter sized sore that looked like something had desovled a small pit into its flesh. The animal didn't seem to be bothered by it. There were also small,dime to nickle sized white patches where the skin looked like it had peeled off. It also seemed like it was loosing its suckion disks. I would find some damaged or partially or completely missing from the arms. Now our new GPO is showing the same symptoms. The water chemistry is fine, so can anyone help me out with this?