Live weights taken on animals when the average age of the contemporary group is between 301 and 500 days of age are used to calculate 400 Day Weight EBVs within the TransTasman Angus Cattle Evaluation (TACE).
Recording 400 day weights
All weights should be recorded using appropriate (and accurate) scales. Do not guess/estimate weight or use measuring tapes to calculate weight. Either weigh the animals using appropriate scales or don’t record weights. Weights should be recorded to the nearest kilogram.
When should 400 day weights be collected?
The 400 day weight for an animal needs to be
recorded when the average age of their contemporary group is between 301 and 500 days of age.
Within this age range, a date should be chosen that fits in with normal, routine management practices and is reasonably close to when the average age of the group of animals is 400 days of age. TACE provides suggested weigh dates to assist you when making this decision.
Animals do not need to be weighed when they are all individually 400 days of age on the day of weighing, but rather the whole contemporary group weighed when the average age of the group is approximately 400 days (i.e. 13 – 14 months).