TREATMENTS FOR SHEEP AND GOAT PARASITES 
Stomach worms: Copper sulphate, one per cent solution in water, 
to animals fasted overnight; if used as a routine repeated treatment, 
animals need not be fasted. For sheep, 100 cc. (3.5 fluid ounces), for 
lambs, 50 cc. (1.75 fluid ounces.) No purgation. Worms pass for four 
days. Efficacy, 93 per cent as indicated on the basis of worms passed 
and worms present postmortem. As noted in connection with stomach 
worms in horses, many of the worms killed by anthelmintics in the 
stomach are digested there, and the check animals in stomach worm 
experiments on sheep indicate that many of the worms which are 
killed are digested and therefore not accounted for in the examination 
for worms passed; it seems certain that the copper sulphate treatment 
is much more than 93 per cent effective. It falls short of 100 per cent 
efficacy, but is probably close to 99 per cent effective. The doses 
which are given here may be repeated at intervals of three to four 
weeks throughout the year in places where stomach worms are prev¬ 
alent, with decided benefits in the way of increased production of 
mutton and wool. The one per cent solution may be made up at the 
rate of one gram of powdered blue crystals of copper sulphate to 99 
cc. of water, or, for large amounts, at the rate of one-fourth pound of 
copper sulphate dissolved in one pint of boiling water, with cold water 
added to this solution to make a total of three gallons, enough to dose 
100 adult sheep and allow 10 per cent for waste. 
Another treatment consists in using a solution containing one per 
cent copper sulphate solution and one per cent by weight of snuff or 
powdered tobacco. The tobacco is steeped in the water overnight 
and the copper sulphate then added. The dose and method of treat¬ 
ment is the same as for the copper sulphate treatment given above. 
The reported efficacy is 90 to 100 per cent; 90 is probably too low as 
noted above. See Addendum, page 92. 
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