286 
THE VETERINARY SCIENCE 
allow the matter to run out, then bathe, as above mentioned 
and pour hot green salve directly into the hole. When the 
discharge of matter smells very bad, and the bone is likely 
Fig. 48. — Fistulous Withers. 
to be diseased, throw the animal, cut down to the diseased 
bone, scrape it and then treat with green salve by pouring it 
into the cut twice a day after bathing. Both this disease and 
poll evil, in bad cases, are tedious to treat. When dressing 
the wound put a twitch on the horse's nose if he is very ugly. 
If there is a thickening after the parts heal, rub with acid 
liniment, applying it every third day after bathing with luke- 
warm water and salt until the thickening is gone. 
6. Sweeny (Shoulder Slip). 
This is more commonly met with in young than in old 
horses. 
Causes. — It is the result of bruising the muscles of the 
shoulder in some manner. This may be done when a plow 
strikes a stone, causing a sudden jerk, or when the wagon 
strikes a stone, causing the tongue to swing violently to one 
side, resulting in injury from it or the neckyoke. 
Symptoms. — These are well marked. As soon as the 
horse receives the injury there is a slight swelling and sore- 
ness of the part, followed by a wasting away of the muscles 
that are injured. It is generally the muscles lying over the 
shoulder blade that become affected with this disease, and in 
some cases the muscles fall away until there is a lar^-p hollow 
