OVARIOTOMY IN THE DOMESTIC ANIMALS. 
407 
NO. 2, FIVE YEARS OLD, CALVED OCT. 
26, 
1899. 
Weight of milk for the first week 
177.7 lbs. 
Fat 4.1 
% 
< < < < i i 
“ “ second “ 
181.3 
< < 
“ 3.6 
< « 
< < < < < < 
“ “ third 
173.3 
( < 
“ 4.3 
< < 
(Spayed November 22.) 
Weight of milk for the fourth week 168 
lbs. 
Fat 3.2 
°/o 
i i i i a 
“ “ fifth 
169 
< < 
“ 3-3 
(< 
i i < < < < 
“ “ sixth “ 
153-7 
< i 
“ 3 
< < 
a < < < < 
“ “ seventh “ 
145.6 
< < 
“ 3-4 
< < 
a 1 ( a 
“ “ eighth “ 
159-3 
< < 
“ 2.8 
< < 
Daily milk production prior and following . 
Nov. 18, 1899 27.2 pounds. 
“ 19, “ 23.8 “ 
“ 20, “ 23.3 “ 
“ 21, “ 29 “ 
“ 22, “ (spaj^ed) 22.3 “ 
“ 23, “ 16.5 “ 
“ 24, ‘' 24.6 “ 
“ 25, “ 22.8 “ 
“ 26, “ 27.8 “ 
“ 27, “ 28 “ 
“ 28, “ 26 
Wc see by the above data that on the clay following the 
operation there was a decided falling off in milk produc¬ 
tion, but no great difference on the second day. 
In my observations the operation does not increase the 
amount of daily milk production, but as it dispenses with 
the period of “ heat,” we get a uniform milk flow, which is not 
the case with entire cows. 
Any person accustomed to the care of dairy cows is aware of 
the fact that many animals fall off one-half or even more in the 
milk yield during the periods of oestrum, which means a consid¬ 
erable loss to the owner during the year. When the cow is 
spayed we not only do away with all trouble attending the 
period of “ heat,” but the accidents and ailments attending 
gestation and parturition. 
The operation in nymphomaniac cows is one of great value, 
as it completely destroys their sexual desires and renders them 
profitable dairy animals. One of these cows spayed by the col¬ 
lege clinic has been in milk over two years and still yielding a 
good flow. 
