Compare scenarios
Compare feed plans for one animal side by side. Edit the animal once; every scenario is measured against the same target, with deltas shown versus the baseline (the first column).
How she’s milking
She’s feeding lambs at foot — a short, sharp lactation that peaks early and tails off fast.
Enter the lambs and how fast you want them growing — we work out the milk she must make, then what she needs to eat to make it.
To grow 2 lambs at this rate, she needs to milk ~3.19 L/day.
Milk covers ~92% of their needs at this age — the rest comes from grazing. The diet below is sized to make that milk.
Milk is estimated from the lamb’s growth — a planning guide, not a measured yield.
How much extra energy stock burn getting their feed — least when barn-fed (housed), rising across flat, rolling and steep country as they walk and harvest more.
None — sheltered, dry or mild.
Cold— a cold, wet or windy spell (a raw winter’s day, roughly below 10 °C with rain or wind), or shorn stock in cool weather.
Severe — a cold storm: driving wind + rain, a hard southerly, near or below freezing, or off-shears caught in it.
Cold stress is about wind and wet, not the temperature reading. NZ standards leave it out for sheltered stock — turn it on for exposed or wintered animals.
Mid is her steady state — full intake, milk near its peak. Early lags (intake hasn’t caught up, so she milks off her back); Late tapers toward drying off.
As on your milk test (crude protein %).
Gain reserves feed alongside milk; a negative value lets her milk off her back.
Built on established AFRC/CSIRO nutrition science — a decision-support guide, not a substitute for a nutritionist or vet.