This app will help you check whether your heifers are likely to reach
their target weights.
The Estimate Extra Production tool lets you estimate the extra production
that might be achieved if heifers reach a target of 85% of the
production of the mature cows.
The Estimate Reduced Culling tool helps you see the impact of heifers
being lost early from the herd.
The weight calculator tool will let you enter the current weight and the
target weight of your heifers and will help calculate the growth rate
required to achieve your target weight.
The Growth Calculator tool will allow you to enter the diet you are
feeding, and to see whether this diet is likely to achieve the growth
rates you need
This calculator is designed to work out what growth rate your heifers
will need to achieve to meet their target.
As a rule of thumb, growth rates of 0.6-0.8 kg/day are
fairly easy to achieve from pasture alone.
Growth rates above 0.8 kg/day may require supplementary
You can use the Diet Calculator tool to see if your
current diet is likely to pose a risk.
Consult a nutritionist if your diet poses a risk of
This calculator is designed to work out what growth rate your heifers are
likely to achieve on their current diet.
Step 1. Current targets:
Step 2. Requirements
Step 3. Pasture availability
What sort of pasture is available?
Step 4. What supplementary feed are you giving them?
Step 5. Analysis
Assuming the grass above and that heifers are eating as
much as they can we can calculate the expected growth
(Note - these calculations are based on rules of thumb
only. You should seek professional advice before acting
on these calculations!)
This tool estimates the increased production that might be achieved if
heifers are "On Target"
If they produced 85% of the mature cows you could be
producing this many more litres per heifer:
(you could produce more milk, or the same milk with less
** These are rules of thumb only.
Temperature, exercise and genetics and other factors will
(Adapted from Holmes CW, Wilson GF (1987) Milk Production