DISEASES. 



58 



special Causes. 



Presence of vegetable parasite causing 

 fungous secretion of imperfect horn 

 in sole of foot. 



Bruise of the ligumentous and some- 

 times bony structures underlying 

 the poll or withers, resulting from 

 injury, such as catching the neck 

 on beam, or blow, or pressure of 

 harness. 



Dirty, wet, or over-heated stable. 

 Contracted heels. Bruised frog. 

 Navicular disease. 



Simple or malignant inflammation of 

 skin in pan of heel. Exposure to 

 cold and wet. Standing in liquid 

 manure. Gross feeding. Eczema. 

 General neglect. 



Presence of a horn parasite, between 

 outer and inner layer of horn of 

 foot. 



Imperfectly fitting collar or saddle. 

 Naturally bad conformation of 

 animal. Uncleanliness and neglect. 

 Bad riding. 



Injury. 



Local inflammation of structures 

 immediately under the skin, or of 

 glands, resulting from injury or 

 blood poison. 



Special Symptoms. 



Rapid destruction of horn of whole of solt, 

 leaving ragged edges. Excessive growth 

 of new soft fungous horn, which does not 

 cohere. Characteristic foetid discharge. 

 Lameness. 



Painful fluctuating swelling on the poll or 

 withers, with constant discharge of pus 

 when the skin is broken, and pressure is 

 applied to the sides of the tumor. 



Foetid discharge from the cleft of frog, 

 with more or less destruction of horn of 

 frog only. 



Red inflamed patches in the heel, with dis- 

 charge more or less ofiensive. Skin 

 sometimes ulcerated, and at other times 

 covered with "proud flesh" or fissures. 

 Lameness. 



Slight lameness and existence of cavity 

 between the two layers of horn of walls 

 of hoof, extending from sole to coronet. 

 Cavity often contains .soft or powdered 

 horn. 



In first stages a circumscribed puffy 

 swelling of skin, soon followed by loss of 

 hair, and the appearance of an open 

 sore. 



A soft fluctuating swelling under skin, 

 which may contain blood, serum, or pus, 

 if occurring on the soft parts of the 

 body; but swelling is hard and tense if 

 tlie brui.se is on the bone or ligamentous 

 structures. 



Hard defined swelling in any part of the 

 body distinct from the natural .struc- 

 tures, becoming soft only when pus 

 forms. 



Special Treatment. 



Total removal of diseased horn. Apply to sole of 

 foot Ointments No. XXXVII. and X. on alter- 

 nate days, applying as much mechanical 

 pressure to sole as possible with cotton 

 wool pads. 



EflScient incisions aimed to obtain a free discharge 

 of pus. Thorough irrigation with a 5 per 

 cent, solution of carbolic acid or a 20 per cent, 

 solution of peroxide of hydrogen or a one per 

 cent, solution of bichloride of mercury. These 

 solutions to be used in turn. 



Cleanse thoroughly with solution of perehloride 

 of mercury, one part to fifty of alcohol. Pare 

 out diseased frog, and dress daily with 

 calomel inserted in cleft of frog on piece of 

 cotton-wool. 



In simple cases apply Ointment No. X. with 

 dry bandage. In severe cases bathe heels 

 alternately with hot and cold water, dry 

 thoroughly, and apply Ointment No. XII. 

 alternated with Ointment No. XXXVIII., and 

 bandage at night. Give tablespoonful of 

 Powder No. XVI. once daily in food. 



Cut away sufficient horn to allow of the insertion 

 of a mixture of equal parts of glycerine and 

 carbolic acid, so as to reach all affected horn. 



Cleanse thoroughly with antiseptic solution No. 

 XV., and apply Liniment No. III. three times 

 a day. After forty-eight hours substitute No. 

 X. Ointment. In the event of sloughing of 

 any diseased skin, use Ointment No. 

 XXXVIII. 



If swelling is great, bathe with hot water, dry 

 thoroughly, and use Liniment No. III. If 

 swelling is slight, apply cold water application 

 and Lotion No. VI. If fluid or pus forms, 

 lance when ripe. Evacuate contents, and 

 irrigate with a 10 per cent, solution of 

 peroxide of hydrogen. 



If hard, use first Liniment No. I., and if persis- 

 tent, blister with No. VIII. When swelling 

 fluctuates, lance freely, and evacuate contents 

 and irrigate with a 10 per cent. sol. of 

 peroxide of hydrogen. If induration remain, 

 the tumour must be dissected out by com- 

 petent surgeon. 



