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Description: Bottle jaw is an accumulation of fluid under the jaw. It is a sign of infection with Haemonchus Contortus (barber pole worm) in sheep and goats. Bottle jaw appears as a "swelling" under the jaw. Swelling may also be detected low on the abdomen. The "swelling" is actually edema caused by blood and protein loss. Mucous membranes of the eye will also be pale if H. contortus is the cause of the bottle jaw. H. contortus is not the only cause of bottle jaw.