380 BUREAU OF ANIMAL INDUSTRY. 



ing. In these cases the hair may fall out and the epidermis peel off, 

 l)ut the inflammation soon subsides, the swelling disappears, and only 

 an increased sensitiv^eness to cold remains. 



In cases mon —^'-e, irregular patches of skin are destroyed and 

 after a few daj '• ..^h away, leaving slow-healing ulcers behind. In 

 the cases produced by low temperatures and deep snow, the coronary 

 band is the part most often affected. 



In man}^ instances there is no destruction of the skin but simply a 

 temporary suspension of the horn-producing function of the coronary 

 band. The fore feet are more often affected than the hind ones, and 

 the heels and quarters arc less often involved than the front part of 

 the foot. The coronary band becomes hot, swollen, and painful, and 

 after two or three days the horn separates from the band and slight 

 suppuration follows. For a few days the animal is lame, but as the 

 suppuration disappears the lameness subsides. New horn, often of an 

 inferior quality, is produced by the coronary band, and in time the cleft 

 is grown off and complete recovery is effected. The frog is occasion- 

 ally frostbitten and may slough off, exposing the soft tissues beneath 

 and causing severe lameness for a time. 



Treatment. — Simple frostbites are best treated by cold fomentations 

 followed by applications of a 5 per cent solution of carbolized oil. 

 When portions of the skin are destroyed, their earlj- separation should 

 be hastened by warm fomentations and poultices. Ulcers are to be 

 treated by the application of stimulating dressings, such as carbolized 

 oil, a 1 per cent solution of nitrate of silver or of chloride of zinc, with 

 pads of oakum and flannel bandages. In many of these cases recovery 

 is exceedingly slow. The new tissue by which the destroyed skin is 

 replaced always shrinks in healing, and, as a consequence, unsightly 

 scars are unavoidable. Where the coronary band is involved it is 

 generally advisable to blister the coronet over the seat of injury as 

 soon as the suppuration ceases, for the purpose of stimulating the 

 growth of new horn. Where a crevasse is formed between the old and 

 new horn, no serious trouble is likely to be met with until the cleft is 

 nearly grown out, when the soft tissues may be exposed by a breaking 

 off of the partly detached horn. But even where this accident hap- 

 pens final recovery is secured by poulticing the foot until a sufficient 

 growth of horn protects the parts from injury. 



QUITTOR. 



Quittor is a term applied to various affections of the foot wherein 

 the tissues which are involved undergo a process of degeneration that 

 results in the formation of a slough followed by the elimination of the 

 diseased structures by means of a more or less extensive suppuration. 



For convenience of consideration quittors may be divided into four 

 classes, as suggested by Girard: (1) Cutaneous quittor, which is known 



