Intestinal Worms 345 
the appetite is usually capricious, and the animal does 
not appear to be in as good condition as the amount 
of food consumed would warrant. There is often itch- 
ing about the anus, which causes the animal to rub 
against various obstacles, often wearing away the hair 
at the roots of the tail. The worms, or eggs, are 
usually passed with the dung, as a close examination 
with the lens may reveal. In horses, there is frequently 
a collection of a whitish-yellow substance close to the anal 
opening. In dogs and sheep, small, white, rectangular 
segments of the flat tape-worm can frequently be ob- 
served in the excrement. Owing to the habits of the 
animal, the pig and dog are most frequently attacked 
by intestinal worms. Sheep are frequently infested 
with tape-worms, derived from pastures or drinking 
places infected by dogs, especially by the dogs used in 
herding sheep. Young animals that are out of condi- 
tion, or those fed largely on one kind of food, are 
more liable to attack by intestinal worms. 
Preventive treatment is more satisfactory and eco- 
nomical than medicinal. Animals liable to attack 
should be kept in vigorous, thrifty condition by allow- 
ing them sufficient and suitable food in variety. Com- 
mon salt should be supplied to the animals, but not. 
mixed with the food. The quarters, as well as the 
' food and water, should be kept clean and free from in- 
festation and contamination. In many eases, if animals 
affected with worms are given a good variety and an 
abundance of nutritious, laxative food, with some tonic 
medicine, they recover their normal condition without 
further medicinal treatment. 
