PARASITES AND PARASITIC DISEASES OF HORSES oo 
Pastures should be stocked lightly. Heavy stocking means more 
manure, and this, in turn, means a heavier concentration of parasite 
eggs and larve. 
Sloping hillside pastures are better than level ones. Rain and 
melting snow tend to wash manure down to some extent from sloping | 
pastures. The bottom of a sloping pasture is dangerous because 
it has a high concentration of eggs and larve. It should be fenced 
off if possible. 
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FicurE 23.—A, Box with double walls and double floor for sterilizing horse 
manure; B, tight-fitting lid. The space between walls and floor must be 
filled with sawdust to insure insulation 
Rotation of pastures is desirable and should be used so far as 
available pastures permit. It is important to remember that perma- 
nent pastures perpetuate parasites. 
Stock rotation is a sound procedure. For the most part the 
parasites of cattle, sheep, and goats are not transmissible to horses, 
and vice versa. Move horses to a pasture on which cattle or sheep 
have been grazing and move cattle and sheep to a horse pasture in 
alternate years. 
