Fascioliasis/veterinary; Sheep Diseases/epidemiology; Anemia/complications; Anemia/veterinary; Animals; Ascites/complications; Ascites/veterinary; California; Carbon Tetrachloride/therapeutic use; Disease Outbreaks/epidemiology; Disease Outbreaks/veterinary; Edema/complications; Edema/veterinary; Fascioliasis/blood; Fascioliasis/complications; Fascioliasis/drug therapy; Fascioliasis/enzymology; Fascioliasis/epidemiology; Fascioliasis/metabolism; Fascioliasis/mortality; Female; Iron/blood; Sheep; Sheep Diseases/blood; Sheep Diseases/complications; Sheep Diseases/drug therapy; Sheep Diseases/enzymology; Sheep Diseases/metabolism; Sheep Diseases/mortality