found to be adequate as a preliminary to treating horses for bots, 
but it seems necessary to fast a horse 36 hours in order to obtain 
satisfactory results in treating to remove strongyles from the large 
intestine. The directions given in regard to fasting should, therefore, 
be observed. Additional information is needed in some cases as to 
the length of the fast to be observed, but the directions are as accurate 
as it is possible to make them in the present state of our knowledge 
and in many cases a different fasting period, especially a shorter one, 
is known to give inferior results. Animals may be watered soon after 
treatment, but should not be fed for two to three hours, as feeding 
immediately after treatment defeats the purpose of the preliminary 
fasting. 
MASS TREATMENTS VERSUS INDIVIDUAL TREATMENTS 
There is always a demand for mass treatments where large num¬ 
bers of animals are to be treated, and this demand is not limited to the 
farmer but includes some veterinarians. It is a very natural demand, 
since the individual treatment of large numbers of animals, especially 
those where the value of the individual animal, such as a chicken, is 
low by comparison with the larger domesticated animals, requires a 
disproportionately large amount of time in the aggregate. The farmer 
feels that the benefits derived from a treatment of this sort in such 
cases do not compensate for the expense incurred in paying a veterin¬ 
arian for such treatments—and in some cases this would be true. 
For practical purposes, therefore, we may use mass treatments where a 
certain degree of benefit may be expected and where individual treat¬ 
ments, which would be more beneficial, cannot be used owing to the 
time and cost factors. 
Mass treatments are usually in the nature of treatments by means 
of substances added to the feed. Animals are usually fasted before 
such treatments, but the fasting is not for the purpose of emptying the 
digestive tract, as a rule, so much as to make the animals hungry enough 
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