LMK17
Loving the herd life
Yeah, sounds like everything I can think of has been ruled out except for copper. I am surprised that he went from totally normal looking at his vet appt to fish tailed and bleached out in just over a week though. The very didn't notice any signs of copper deficiency, eh? If not, then he's going downhill pretty quickly. I'd consult the vet about the need for a blood test for mineral levels and possibly a faster acting supplement.