DISEASES OF FARM ANIMALS 253 



There are two very inexpensive drenches which 

 will quite effectually do this. The one is gasoline, 

 the other coal tar creosote. The objection to gaso- 

 line is that it needs to be so extremely carefully 

 used or sheep will be killed by it. The dose is i 

 tablespoonful (never more at one dose) to a mature 

 sheep ; mix with not less than 4 tablespoonfuls of 

 raw linseed oil (never boiled oil) ; then add a half 

 pint of sweet milk. In giving, set the sheep up on 

 its haunches and shake the liquids well together 

 until the last minute it is administered, or the gaso- 

 line will separate and, if it enters the stomach in 

 the unmixed form, it will seriously injure and may 

 kill the sheep. 



There is no direct vermifuge that will as effectu- 

 ally kill all species of worms in a sheep's stomach 

 and intestines as will gasoline; yet the coal tar 

 creosote or the more refined class of sheep dips, if 

 given after a full 12-hour fast, before the flock is 

 turned to pasture in the spring, and again about 

 November, will destroy a large number of the 

 mature worms. All lambs born in April or May 

 should be drenched about August or September 

 following, to be certain of ridding them of worms 

 that may later cause their death. The dose of any 

 of the sheep dips is a dessertspoonful mixed in a 

 full pint of water. 



STONE IN BLADDER.— See Concretions or 

 Calculi of Urinary Organs. 



STRANGLES.— This trouble, commonly called 

 colt distemper, affects horses, and rarely mules and 

 donkeys. It is such an infectious disease that 

 nearly all horses contract the disease when colts 

 and usually remain immune to future exposures. 

 The cause is a very small organism or germ which 

 enters the system when a healthy colt comes in 



