GOITRE.
The “swelled neck” in lambs is, like the goitre, or bronchocele, an enlargement of the thyroid glands, and is strikingly analogous to that disease, if not identical with it. It is congenital. The glands at birth are from the size of a pigeon’s egg to that of a hen’s egg, though more elongated and flattened than an egg in their form. The lamb is exceedingly feeble, and often perishes almost without an effort to suck. Many even make no effort to rise, and die as soon as they are dropped. It is rare, indeed, that one lives.
A considerable number of lambs annually perish from this disease, which does not appear to be an epizoötic, though it is more prevalent in some seasons than in others. It does not seem to depend upon the water, or any other natural circumstances of a region, as goitre is generally supposed to, since it may not prevail in the same flock, or on the same farm, once in ten years; nor can it be readily traced to any particular kind of food. When it does appear, however, its attacks are rarely isolated; from which circumstance some have inferred that it is induced by some local or elimentary cause. Losses from this disease have ranged from ten per cent. to twenty, thirty, and even fifty per cent. of the whole number of lambs. Possibly, high condition in the ewes may be one of the inducing causes.
Treatment. None is known which will reach the case. Should one having the disease chance to live, it would scarcely be worth while to attempt reducing the entanglement of the glands. Perhaps keeping the breeding-ewes uniformly in fair, plump, but not high condition, would be as effectual a preventive as any.