Assess lamb size, muscle, finish and intended products together before processing. The heaviest animal is not automatically the best fit for a customer wanting smaller chops and roasts.
Genetics, nutrition and management affect quality and value. Use Penn State's guidance to frame the assessment of your lambs rather than choosing one universal finishing age.
Keep the measurements comparable
Record when and how weights were obtained. Label an estimate as an estimate. If several people take measurements, agree on a consistent method so a change in technique is not mistaken for a change in growth.
Look at individual animals where practical. An average can hide a small lamb that needs further assessment or a larger animal that should be discussed separately.
Assess market-lamb finish with experienced help
Get help from an experienced livestock adviser when assessing market-lamb muscle and finish. A wool coat can make visual guesses unreliable.
Do not borrow a breeding-ewe body-condition target and present it as a slaughter specification. Ontario’s sheep body-condition guidance distinguishes ewe condition scoring from assessment of fatness in market lambs. Sheep body condition scoring.
Connect readiness with the order
Ask what matters to the intended household or customer: roast size, chop size, the balance of cuts or another preference. Discuss what those choices can reasonably mean for the animals available.
Underground Processing bills hanging-weight red-meat processing on hot carcass weight measured before chilling. More live weight does not translate pound for pound into packaged cuts. Bones, fat, processing choices and other factors separate the live animal from the freezer order.
Review the appointment before changing the plan
If readiness varies across the group, give Underground Processing the count and observations for each proposed group. Confirm whether a split or date change is available before changing the farm plan.