The Heataid kit

FAQ

When should the samples be collected?

To ensure consistency you should decide if it is easiest to collect samples at either the morning or the evening milking and then stick with your programme. This is because progesterone levels vary during the day and are higher in the evening, mixing collection times may confuse your results.

How should milk samples be collected?

Because the fat content of fore-milk and the strippings is very variable, it is important to collect the sample after the fore milk has been expressed and before the final strippings are expressed from the udder – collect the sample from the main milking. The ideal sample is representative of the whole milking either taken from the Jar or a sampling system where available.

How soon should samples be tested after collection?

Ideally you should test the samples within 4 hours of collection but they may be stored in a fridge for up to 12 hours. Samples can be preserved for longer by the addition of a Lactab Mark III which are also available from Ridgeway Science.

Can milk samples or kit standards be frozen?

No. Store samples and standards at 4°C in the fridge.

How many samples can be tested with a HeatAid kit?

The kit can be used to test up to 80 milk samples.

The standard has a grainy appearance – can it still be used?

No. The standard needs to be replaced – contact us for replacement standards.

How long can the kits be stored?

The kits have a shelf life of 6 months, when stored unopened at 4°C. Once opened, the kits should be stored at 4°C and will remain useable for 2 months.

I have been getting intermediate results from the tests – what does this mean?

The cow may be entering heat, repeat the test the next day to determine the oestrus state.

The colour is slow to develop – what is causing this?

The test needs to develop at room temperature (16°C or warmer), a cool milk parlour may slow the process.