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Maintaining the Health of Sheep

Sheep seem to be less susceptible to contagious diseases than cattle or hogs, but they may be affected with tuberculosis, brucellosis, anthrax, foot-and-mouth disease, and several other diseases. Several internal as well as external parasites that may at times be very damaging infect sheep. But parasites are seldom fatal and by proper measures all of them may be kept under control and eliminated from a flock in a comparatively short time.

Paralysis in preganant ewes. This disease may occur in a flock one year and does not appear for several years. It affects only ewes that are pregnant. Symptoms are that the ewe does not want to eat, lies down most of the time, gets to her feet with difficulty at first and then becomes paralysed and is unable to get up at all. The lambs are usually born a few days earlier. The affected ewes are nearly always carrying twin or triplet lambs which are usually born dead. Some ewes die before lambing, some shortly after lambing, some recover. The disease is thought to be caused be improper nutrition.

Pneumonia and colds. The main cause of this disease is poor shelter where sheep become wet from rain or snow. The only preventive measures are to provide sanitary shelter and to feed well enough to maintain good general thrift and vitality in the flock.

The stomach worm. This parasite is probably responsible for a greater loss to sheep raisers throughout the world than any disease or any other parasite of sheep. Stomach worms are most damaging to young lambs. The only measure against this parasite is to practice rotational grazing on small pastures.

Sheep ticks. The sheep tick is a large insect that lives in the fleece. It lives by biting into the skin and sucking blood. To control ticks sheep are to be dipped within a few days following shearing each spring.

Exercises

    1. Translate the new words:

Contagious diseases, to be affected, internal and external parasites, to damage, to infect, to eliminate, to occur, pregnant, to become paralysed, preventive measures, general thrift and vitality, a loss, rotational grazing, sheep tick, stomach worms, to be dipped.

    1. What other diseases are sheep susceptible to? Prepare reports. Fill in the table.

Symptoms and causes

Prevention and treatment

Paralysis in preganant ewes

Pneumonia and colds

The stomach worm

Sheep ticks