94 DISEASES OF THE HORSE. 
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oil. The next day give 3 drams of carbon bisulphid in a gelatin 
capsule at 6 o'clock, repeat the dose at 7 o’clock, and again at 8 
o’clock, making a total of 9 drams altogether for an adult horse; 
half that amount will be sufficient for a yearling colt. As previously 
noted, there is some little difficulty and danger of accident in the ad- 
ministration of treatments of this character and it is advisable to call 
in a veterinarian. 
Unless destroyed by treatment, the bots in the stomach of the horse 
pass out in the manure in the spring-and burrow down into the soil 
an inch or two. Here they undergo a certain amount of development 
and finally emerge as adult flies. These bot flies mate and during the 
summer the eggs are deposited by the female on the forelegs and 
shoulders or around the chin, mouth and nostrils of the horse, the 
location and appearance of the eggs varying somewhat with different 
species of bot flies. These eggs or the young maggots escaping from 
them are ingested by the horse in licking the portions irritated by 
the movement of the escaping maggots, and when swallowed develop 
to form bots in the stomach. Careful currying, especially around the 
forequarters, is an aid in keeping down bot infestation, but this is not 
commonly feasible with horses on pasture, the ones most liable to 
become infested. 
