The glans of the penis of the dog, and especially of the young dog, sometimes enlarges, and the prepuce contracts beneath it, and can no longer be brought over and made to cover it The glans becomes of a pale red colour, glossy, and is evidently distended by a fluid. It must be punctured with a fine lancet, and the enlargement will speedly subside. It should then be examined whether any of the hairs at the edge of the prepuce had insinuated themselves into the sheath, and these must be cut off with a pair of scissors.

There is sometimes a discharge, or oozing of blood from the prepuce. This rarely or never proceeds from the urethra; but when the sheath is turned down, a cauliflower-like fungous growth is perceived, from which the blood flows on the slightest touch. If there is no great quantity of it, and the whole can be easily got at, there is a very fair prospect of a cure. It must be cut off closely with a pair of sharp scissors, and the roots touched with the lunar caustic. A second, or even a third, repetition of the paring of the fungus, and the application of the caustic, will not unfrequently be necessary. .

If, however, the sheath seems to be in a manner filled with it, and the whole of it cannot be fairly exposed, humanity will require that the poor animal should be destroyed.

Castration is- best performed in the dog by means of a ligature. An incision- is made into the scrotum, the testicle turned out, and a tight ligature passed round the cord; after which the testicle is immediately removed-

The scrotum itself is subject to disease: there is enlargement of the bag generally, a very great redness of the integument, and the appearance of a superficial pimpled sore. Fomentation with warm water, and the application of the healing ointment (Recipe No. 5, p. 149), will usually effect a cure.

If this is neglected, that which, in the first place, was only inflammation of the integument, will spread to the testicle, and schirrous enlargement and cancer of it will be produced. Little hope of doing good can then be entertained, although in a few instances the friar's balsam and the healing ointment have effected a cure. The iodine pills (Recipe No. 16, p. 176) will be worth trying, if the owner is determined that a cure shall be attempted. la most cases, however, the patient should be put out of his misery as speedily as possible.

Castration will not always succeed in schirrous enlargement and cancer of the testicle: the disease will spread up the cord, when that has begun to enlarge; and, in some cases, when there is no apparent hardening or thickening of the cord, the cancerous tendency will remain.

The fungous excrescences already described are sometimes found in the vagina of the bitch, and generally produced either by difficult parturition, or the forcible separation of the dog from her at the time of heat. If these growths can be got at, a cure may be attempted; but if they are beyond the reach of the scissors or the caustic, no good can be done. These fungous growths, either from ineffectual attempts to get rid of them, or in their natural progress, terminate in cancer of the vagina; and injuries either at parturition, or the period of oestrum, are sometimes productive of the same consequence. It will be useless to attempt to cure cancer in the vagina.