302 THE VETERINARY DOCTOR. 
in which the water contains magnesian limestone. The tumor is at first 
soft, but afterward becomes tense and hard, and will be gritty if opened. 
_TREATMENT.—Provide pure rain water. Give iodine internally and 
apply the same externally. Spongia is an excellent internal remedy, as is 
also drosera. A local use of a lotion of mercurius corrosivus will be bene- 
ficial in some cases, alone or used at intervals, with iodine applied at other 
times. To prevent goitre in lambs, give the ewes in winter rain-water, 
good feeding, and an abundance of open-air exercise. Neglect of such 
precautions has been followed by the loss of the entire produce of the year. 
It will take a long time to effect a cure of a case of real goitre. 
FOOT-ROT. 
Foot-rot is either mild or malignant. The mdc/d form is an inflamma- 
tion of the space between the two parts of the hoof and is usually associ- 
ated with Ulceration of the Mouth (which see). It is caused by sand or 
gravel in the affected part, hard roads, hot weather, and fatigue. The in- 
flammation often extends to the whole foot, with ulcerations, the pastern 
and fetlock joints perhaps becoming involved. There is lameness in one 
foot, or, if both front feet are affected, the animal creeps about on its knees, 
and pain and fever are present. The malignant form affects the whole foot, 
and is caused by a change from dry, upland fields to soft, grassy meadows. 
The hoof becomes softened, grows irregularly, cracks and splits; foreign 
matter in the cracks irritates them, producing inflammation and disorganiz- 
ing the parts, attended with ulcers, detachment of pieces of the foot, and 
‘disease of the bones, cartilages and ligaments. 
TREATMENT.—At first remove all foreign matters, foment the hoof 
with tepid water, and dress all sores with a lotion of arnica or calendula. 
Remove matter, rough edges, and decayed horn, cutting open ulcers to the 
‘bottom if it be necessary to reach the matter, and syringing out the sores. 
Then apply a poultice of turnip or oatmeal, followed by bandaging with 
calendula-lotion. If, however, the formation of pus continues, use the poul- 
tice again. Bandages should be continued until the hoof becomes sound, 
and allirritating substances be kept out. During the formation of pus give 
silicea or hepar, followed by sulphur or thuja. See Foot-Rot in the Ox. 
SWELLING OF THE JOINTS. 
Such swelling is rather common among lambs. It is an inflamed con- 
dition of the joints, usually the knee, sometimes the hock and fetlock, and 
arises from damp and coid. 
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