FLUSHING TO INCREASE LAMB YIELDS. 
13 
Table 7. — Gains made by single and twin lambs in bureau flocks at Middlebury, Vt, 
and Beltsville, Md. 
Single lambs. 
Twin lambs raised as 
twins. 
Twin lambs raised as singles. 
Sex and flock. 
Average weig 
ht. 
Average weig 
ht. 
Average weight. 
A 
A 
w 
o 
o 
a 
A 
A 
CO 
c/5 
i 
03 
A 
A 
en 
W 
o 
6 
tn 
fl 
a 
6 
"£ 
a 
a 
a 
6 
H 
a 
a 
fc 
pq 
o 
£ 
ffl 
to 
2! 
fc 
ffl 
CO 
SO 
M i d d 1 ebury 
flock: 
1916— Rams. . . 
5 
9.0 
75.6 
97.4 
130.8 
9 
9.2 
68.2 
89.4 
131.0 
1 
7.8 
68.0 
84.0 
109.0 
Ewes 
8 
9.2 
64.8 
77.9 
C 1 ) 
10 
7.5 
55.6 
67.9 
C 1 ) 
8 
7.8 
65.5 
81.1 
114.4 
1917— Rams. . . 
5 
7.9 
66.8 
94.8 
11?. 4 
4 
7.6 
59.5 
84.3 
108.5 
4 
7.8 
57.5 
87.3 
118.0 
Ewes 
11 
8.3 
61.7 
78.8 
106.7 
8 
7.5 
55.9 
76.5 
109.6 
3 
7.1 
67.0 
84.3 
111.7 
1918— Rams. . . 
8 
8.6 
56.4 
84.8 
121.8 
12 
7.4 
49.8 
77.9 
117.8 
1 
7.3 
51.0 
83.0 
119.0 
Ewes 
13 
8.8 
54.1 
76.8 
113.7 
11 
6.9 
38.2 
63.8 
107.5 
2 
6.1 
41.0 
68.5 
101.0 
Average: 
Rams 
18 
8.5 
64.6 
91.1 
123.1 
25 
8.1 
58.0 
83.1 
121.0 
6 
7.7 
58.1 
86.0 
116.6 
Ewes 
32 
8.7 
59.4 
77.9 
110.5 
29 
7.3 
49.1 
68.9 
108.4 
13 
7.4 
62.1 
79.9 
111.7 
Beltsvilla flock: 
1917— Rams . 
2 
8.4 
40.5 
69.0 
96.0 
3 
6.9 
45.2 
73.5 
94.7 
2 
6.2 
38.8 
67.8 
91.8 
Ewes.. 
8 
7.7 
42.8 
63.6 
82.0 
3 
6.4 
39.8 
60.8 
86.7 
1 
6.6 
55.0 
74.0 
96.0 
191S— Rams . 
5 
3 
8.3 
8.2 
59.9 
56.5 
82.7 
69.0 
109.4 
104.7 
6 
3 
7.1 
5.8 
49.1 
42.5 
77.3 
68.2 
119.8 
111.7 
Ewes.. 
1 
5.7 
39.6 
61.0 
83.0 
1919— Rams . 
9 
8.0 
54.4 
65.1 
100.2 
5 
7.3 
45.6 
60.6 
97.8 
4 
6.6 
55.1 
66.3 
97.0 
Ewes.. 
13 
8.1 
53.2 
66.5 
91.2 
8 
6.6 
50.7 
64.9 
90.3 
3 
6.7 
53.5 
68.7 
92.7 
1920— Rams . 
7 
8.4 
60.3 
82.0 
124.5 
14 
7.2 
51.0 
78.9 
117.5 
1 
6.8 
40.0 
67.0 
106.0 
Ewes. . 
17 
8.3 
47.8 
64.5 
98.8 
17 
6.5 
44.8 
64.8 
102.3 
2 
6.9 
55. 5 
70.0 
92.0 
Average: 
Rams 
23 
8.2 
56.2 
74.4 
109.2 
28 
7.2 
49.0 
74.7 
112.0 
7 
6.5 
48.3 
66.8 
96.8 
Ewes 
41 
8.1 
49.2 
65.3 
93.6 
31 
6.5 
45.6 
64.8 
98.6 
7 
6.6 
52.2 
68.7 
91.6 
Average: 
All rams... 
41 
8.4 
59.9 
81.7 
115.3 
53 
7.6 
53.2 
78.7 
116.3 
13 
7.0 
52.8 
75.7 
105.9 
All ewes... 
73 
8.4 
53.6 
70.9 
99.8 
60 
6.9 
47.3 
66.7 
102.3 
20 
7.1 
58.6 
75.9 
104.7 
All lambs.. 
114 
8.4 
55.9 
74.8 
105.8 
113 
7.2 
50.2 
72.3 
109.5 
33 
7.1 
56.9 
75.9 
105.2 
Placed in special experiment and weight not comparable. 
SUMMARY. 
1. Feeding at breeding time to increase the number of twins pro- 
duced by ewes is called " flushing." 
2. The percentage of lambs produced by a flock depends upon the 
number of dry ewes and the proportion of ewes producing twins 
and triplets. 
3. The practical advantage of flushing lies in the production of 
twins, which in turn depends upon the number of ova produced by 
the ewe. 
4. Experiments reported herein indicate that ewes getting in lamb 
first produce the largest percentage of twins. 
5. Data from experimental work indicate that ewes should gain 
at least 7 pounds a head during the breeding season to obtain largest 
percentage of twins. 
6. There seems to be a natural tendency toward twin production, 
which varies in different breeds. 
7. It is only in extreme cases that the ram has shown any influence 
on the number of twin lambs produced by the flock. 
