298 



two to three ounces of Epsom salts, and half an ounce of cream of 

 tartar in a mash, night and morning. In recent cases, this treatment 

 soon sets matters right, but in chronic cases, a tonic treatment has to 

 be adopted. Swelling of the penis may also arise from protracted 

 strangles, influenza, and other debilitating diseases. 



726. Excoriation of the Penis. — This is mostly seen in stallions, 

 as a result of excessive service in hot weather, particularly when the 

 grooms are not sufficiently careful to wash the parts well with cold 

 water immediately after service. It may also arise both in the stallion 

 and bull, from having communication with a female suffering from 

 chronic inflammation and ulceration of the vagina (vaginitis, par. 798) 

 or from whites (leucorrhoea, par. 746). Treatment. — Take the 

 animal off" service, and wash the parts, and also the sheath, night and 

 morning, with a mixture of one part phenyle and 80 parts water. 

 Afterwards dress with the following lotion : — Sulphate of zinc two 

 drachms, fluid sanitas five ounces, cold water one pint. 



727. Sebaceous Accumulations in the Urethal Sinus (Plate 

 XVIII., R.) are collections of solid clay-like matter in the cavity 

 round the opening of the urethra, at the point of the penis of the 

 horse, which occasionally cause lameness in one or both hind legs, 

 In four cases, in my practice, the animals could not pull their hind 

 extremities forward, but stood with them stretched backwards, as if 

 in the act of staling ; on washing the penis, and removing the hard 

 matter, they pulled themselves together as if nothing had been amiss. 

 In three other cases, the horses had a peculiar lameness in one hind 

 leg, without any apparent cause ; but on examining and removing 

 the collected material from the penis, the lameness disappeared. 

 Prevention. — Wash the parts with soap and warm water once every 

 five or six months and remove any accumulation that may be 

 present. 



728. Castration. — This is one of the oldest operations on record. 

 The main object of its performance is to render animals more docile, 

 and easy to manage, and although it has a marked quietening effect 



