PERFORMANCE OF MORGAN HORSES UNDER SADDLE 13 
a significant difference between the groups of dams to which the sires 
were mated, in time required by their offspring to walk a mile (table 
18), but the offspring of mares mated to Mansfield and Hudson were 
significantly slower than those of the same mares mated to Canfield. 
Colts by Mansfield also were significantly slower than those out of the 
same mares by other stallions (table 9). 
Ii6 MINUTES AND OVER (TO WALK | MILE) 
15.0 -15.9 MINUTES 
MEAN— 
14.0-14.9 MINUTES 
UNDER 14.0 MINUTES 
NUMBER OF HORSES 
O-NWHO-NWAUADHDNDAOO—-—NUDBUAHO-NWH 
4.0 4.5 5.0 EE 6.0 
AVERAGE LENGTH OF STRIDE (FEET) AT WALK 
Ficaure 3.—Distribution of horses with different length of strides according to 
time required to walk a mile. 
Horses having a medium slope of shoulder had the fastest walk, as 
shown in table 6. Horses covering the distance in the shortest time 
invariably had a fairly long stride (table 5). _Slow horses, on the other 
hand, had either a short or a long stride. These findings are demon- 
strated in figure 3, which shows that slow horses (those requiring 16 
minutes or more to walk a mile) varied in length of stride from 4.1 
to 5.8 feet, whereas fast horses (requiring less than 15 minutes) varied 
from 5 to 5.9 feet. None of the sires produced all progeny with both 
