12 BULLETIN 996, U. S. DEPARTMENT OE AGRICULTURE. 
Table 6. — Weights of 6 -months-old twin and single lambs. 
Singles. 
Twins. Twins raised as singles. 
Kind. 
Number. 
££!? \ ■—* 
tssr i »■»*«• 
Average 
weight. 
Earn lambs 
32 
46 
Pounds. 
85.4 
73.8 
45 
37 
Pounds. 
81.6 : 9 
67.6 15 
Pounds. 
^ 7 
E we lambs 
All lambs 
7S.3 
7S 
7S.6 
go 
75. 3 24 
79.9 
The twin-born ewe lambs averaged 6 pounds lighter at six months 
than those born singles, while in the case of ram lambs the difference 
was 4 pounds. In the smaller groups of twin lambs raised as singles 
the ewes made an especially good growth, averaging more than the 
single lambs. 
Three experiments were conducted to determine whether twin ewe 
lambs would catch up in weight with the singles if given an oppor- 
tunity. Of the 1915 crop, 19 head of singles and 22 twin-ewe lambs 
were fed separately for 112 days (December 8, 1915, to March 28, 
1916). At the outset the singles were 8.6 pounds heavier and at the 
close of the test they were 11 pounds heavier. They received similar 
feed, but that eaten by the twins contained about 6 per cent more 
total energy. After running in the same lot on pasture until August 
30, 1916, the single-born lambs were still 8 pounds heavier. 
In November, 1916, 8 head of single ewe lambs and 8 head of twins 
that had been raised as twins were placed in a similar experiment. 
The average daily ration fed the twins contained 0.28 pound of pro- 
tein and 1.84 therms of energy as compared with 0.24 pound of 
protein and 1.57 therms of energy for the singles. At the start the 
singles were 7 pounds heavier and at the close of the special feeding 
the weights were identical. The twins were somewhat fatter, how- 
ever, and after running with the others on pasture until August 25, 
1917, were 2.4 pounds lighter. 
In the summer of 1917 an attempt was made to furnish lambs 
raised as twins sufficient extra grain to permit them to catch up with 
those born singles. From birth (about March 1) until July 1, there 
were 11 single ewe lambs and 3 born twins but raised as singles in 
one lot, and 8 twin-raised ewe lambs in the other lot. During that 
time the former ate 50 pounds of grain each and the twins 63 pounds, 
with the result that the twin lambs averaged 7 pounds lighter than 
the others. Subsequently the lambs were fed and pastured as one 
lot until December 29, 1917, at which time the singles were 3 pounds 
heavier. From December 29, 1917, to April 6, 1918, the single lambs 
ate an average daily ration of 1 pound of the following grain mix- 
ture: Cracked corn 100 parts, bran 30 parts, in connection with 2 
pounds timothy hay and 2 pounds turnips per head. That eaten by 
