Sheep Parentage ROI

Work through the flock as a consultant would

Start with the current system, then test how much value parentage records could unlock from fewer passengers, better mothers, stronger sire choices, and more targeted terminal mating.

Move the big levers

Reduction in unproductive ewes3.3 percentage points

This is the practical value of finding dry, wet-dry, missing, and repeat-problem ewes earlier.

Extra lambs weaned from better mums5 lambs per 100 ewes

Example: 4 lambs per 100 ewes means 0.040 extra lambs weaned per ewe mated.

Lambs lost between scanning and weaning22% predicted loss

Move right to lose fewer lambs. Move left if losses are worse than expected.

Ewes kept for maternal breeding30% of ewes

The smaller the maternal group, the more ewes can be mated for terminal lamb value once you know who your best mothers are.

Build the cull draft

Tap the groups a farmer would be confident to act on once parentage records show the pattern.

Cull draft value is included in the wastage and labour assumptions.

Farm base

Breeding ewes mated Weaning percentage after lamb losses

0% Shows the effect of losing more or fewer lambs after scanning.

Current lambs scanned per ewe mated Example: 1.65 means 165 lambs scanned per 100 ewes mated. Current lambs weaned per ewe mated Example: 1.40 means 140 lambs weaned per 100 ewes mated. Average lamb weaning weight, kg Lamb value, dollars per kg liveweight Average ewe liveweight at mating, kg Used for kg lamb weaned per kg ewe mated. Current replacement rate, percent of ewe flock

Wastage and unproductive ewes

Current unproductive ewes, percent of ewes mated Dry, wet-dry, deaths, and persistent non-performers. Reduction in unproductive ewes, percentage points Example: 8% down to 6% is a 2 percentage point reduction. Annual ewe feed consumed, kgDM Feed value, dollars per kgDM Example: 0.20 means 20 cents per kgDM. Replacement ewe cost, dollars Deaths within wastage, percent of wastage group

Best ewes and better replacements

Extra lambs weaned from better mums 0.030 means 3 extra lambs per 100 ewes mated. Extra weaning weight from better maternal lines, kg per lamb weaned Replacement rate reduction, percentage points Example: 25% down to 23.5% is a 1.5 percentage point reduction. Intervention saving, dollars per ewe mated each year Labour, treatment, repeat handling, and avoidable trouble.

Mating strategy once records build

Ewes kept for maternal breeding, percent of ewes Terminal sire extra weaning weight, kg per lamb weaned Terminal strategy starts in year Planning period, years

Parentage programme cost

DNA test cost per animal Sampling and handling per animal EID tag cost per animal Annual data/admin cost Ewes tested in year one, percent of ewe flock These are the foundation ewes. They are not charged again in later years.

The model assumes 100% of lambs weaned are DNA tested. From year 2 onward, lambs tested move with the weaning percentage after lamb losses.

Cumulative net benefit

Payback estimate will appear here.

ROI 0%

Net per ewe $0

Baseline kg/ewe 0 kg

Kg lamb/kg ewe 0.00

Year by year

Year	Animals tested	Benefit	Cost	Annual net	Cumulative net

Where the gross benefit comes from

These are benefits before programme costs. The net result below subtracts testing, sampling, tags and admin.

Avoided wastage$0

Extra lamb production$0

Fewer lambs lost$0

Terminal mating gain$0

Replacement and labour$0

Total gross benefit$0

Less programme cost$0

Net benefit$0

Calculating breakeven...