FLUSHING TO INCREASE LAMB YIELDS. 7 
In all but two cases flushed ewes came to the first service earlier 
than those unflushed, the time ranging from one-half day to 8 days. 
UNIFORMITY OF LAMBS' AGES. 
Having all the lambs of about the same age is a great advantage 
in marketing and flock management. Since flushing brings ewes to 
service earlier, it should be a great aid in preventing late lambs. 
This expectation was not realized, however, in the experiments. 
More of the cases of not getting in lamb until the second or third 
service occurred among the flushed ewes and was of course followed 
by a larger proportion of late lambs. 
The number of ewes lambing to each successive service in each 
year is shown in the following table ; the ewes which were bred after 
being interchanged between lots are not included : 
Table 2. — Number and per cent of ewes getting in lamb at each service. 
Unflushed lots. 
Flushed lots. 
Year. 
Lot 
No. 
Ewes 
in 
lot. 
Service. 
Lot 
No. 
Ewes 
in 
lot. 
Service. 
1st. 
2d. 
3d. 
4th. 
5th. 
1st. 
2d. 
3d. 
4th. 
5th. 
■ 
1916 
1 
3 
5 
7 
9 
15 
10 
19 
17 
15 
8 

15 
7 
14 
5 
4 
3 
4 
1 
2 
5 
1 
5 


1 

1 






2 
4 
6 
8 
10 
11 
13 
14 
16 
17 
25 
15 
20 
13 
14 
11 
21 
21 
20 
16 
10 
7 
15 
6 
11 
7 
6 
12 
13 
9 
10 
7 
3 
3 
3 
2 
7 
3 
4 
4 
3 
1 
2 
3 

1 
6 
6 
2 
1 
1 


1 

1 
2 

1 
1 
1 
1917 


1918 



1919 
12 
25 
13 
9 
2 
1 



1920 
15 
20 
11 
8 

1 


1 
Total . . . 
121 
68 ! 34 
56 ! 28 
15 
13 
4 
3 


176 
96 
55 
46 
26 
25 
14 
7 
4 
2 
1 
TWIN PRODUCTION AS AFFECTED BY AGE OF EWE. 
Flock records of the Bureau of Animal Industry show a gradual 
rise in the proportion of twins born until the ewes are 5 and 6 
years old. There is a possibility that this is due in part to elimination 
of ewes not dropping twins. In our experimental flocks, however, 
ewes hav^e never been discarded on that account, although some ewes 
have been kept to advanced age that might have been disposed of 
one or two seasons earlier if it had not been for their marked prolifi- 
cacy. The figures given in Table 3 for ewes over 6 years old may, 
therefore, have been to a slight extent affected by selection. The 
data given include nine years' records. The ages are those at time 
of lambing: and not at time bred. 
