_Symptoms._ These are by no means obtrusive. There may be some delay in the discharge when the animal attempts to urinate, and the last drops of the urine, white and purulent or glairy, may be passed with evident pain. There is a tendency to constipation with painful straining to defecate. Compression of the prostate during defecation presses out its muco-purulent contents so that there is a greater urethral discharge following this act than at other times. This is also more abundant from the compression of the abdomen when the animal is lying down. This discharge is easily distinguished from semen by the absence or almost complete absence of spermatozoa and _the abundance_ of spermatic crystals, precipitated by ammonia phosphate. In the earlier stages there may be undue generative excitement, erections, and even seminal discharge, with or without the movements of masturbation but in advanced cases genital ardor is usually defective or there may be practical impotence. Conclusive evidence is obtained by rectal exploration, when the enlarged, or irregularly shaped and tender prostate can be easily recognized. If a sterile catheter is passed the pain caused as it touches the prostate is significant. In the dog the affection may last for years, and tends to advancing atony of the hind limbs. A temporary arrest of the affection is often misleading, though the urine may be clear and normally discharged, yet manipulation may show a gradually advancing abscess, and when this bursts, usually into the urethra, all the symptoms become aggravated and cystitis, urethritis and general infection are to be dreaded. _Treatment._ This is far from satisfactory yet in certain purely follicular or catarrhal cases it may prove successful. An open air life, without exertion, and a milk and farina diet are desirable, yet any tendency to costiveness must be obviated by saline laxatives and enemata. The avoidance of generative excitement must be secured, not only by restraining stud animals from service, but by keeping them well apart from all females of the same species. Even castration may be sometimes resorted to with advantage. Stallions given to masturbation must be restrained by net or otherwise. Any disease of the rectum, anus, urethra or bladder should be corrected, and undue exposure to cold prevented. Lafosse advises to slaughter butcher animals for food. Hertwig recommends iodine ointment on the anus and perineum of affected dogs. It must be borne in mind that the affection is maintained by infective microbes yet it is difficult to reach and deal with these thoroughly and effectively.