= (actual yearling wt - actual weaning wt) x 160 + 205-day adj. weaning wt
No. of days between measure ages
Actual yearling weight 1085 lb yearling measure age
Actual weaning weight 660 lb weaning measure
age 209 days
205-adjusted weaning weight 731 lb
|Adjusted 365-d Yearling Weight =
(1085 - 660)
Adjusted 365-day weights are computed to adjust an actual yearling weight taken
by the breeder to a standard animal age (365-day, typically) and age of dam (this
adjustment takes place through the use of the 205-d weaning weight). Acceptable
calf ages for yearling measures are 320-440 days of age.
The suggested period between weaning and yearling weight is 160 days. A common mistake
is that the two weights are taken too closely together. Although the window of acceptable
weaning weight ages is 120 to 280, and yearling wt age 320 to 440 days of age, you
need to try to allow for more postweaning gain growth time to better characterize
Weight per Day of Age (WDA)
Many times, weight per day of age (WDA) calculations provide a source of confusion.
In contrast to the 365-day yearling weight, the WDA is calculated as follows:
WDA = Actual weight/days of age
In the above example using weaning weight as the actual weight taken, WDA= 660/209
= 3.16 lb per day of age
The scores provided are designed to evaluate disposition differences when processing animals through the chute.
Scores should be an observation of how animals enter, exit and react while being handled in the chute.
Docility may be reported on:
1. Cows when they wean their calves
2. Calves when yearling data is reported
Acceptable, mild disposition, most favorable temperament.
Restless during processing.
Nervous and impatient.
4 Flighty (Wild)
Jumpy and out of control, quivers and struggles violently.
Added aggressive behavior, extreme agitation.
6 Very Aggressive
Extremely aggressive temperament.