94 DISEASES OF THE HOESE. 



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. 



