help, Need advice, keep lousing sheep have dorpers keep having losses??? ive dewormed them twice this year my feed places never give me the same feed, vet said somethings whiping out their liver but told me to worm them so used valbazen but didnt bother to tell me dont giveb it to pregnant or nursing ewes and resulted in more losses, then he gave me safeguard, ive invested everything into these sheep and am waypassed spent on finances and recorses, I just dont know what to do at this point??? unsure if its copper or feed toxicity, or paracites??? Anyone have any advice??