Kite Feedlot Team
November 27, 2023
Tips for the Summer
Feedlot cattle are highly vulnerable when there is a rapid onset (over 4 – 7 hours) of an extreme heat event where the HLI exceeds 100 units. Under these conditions, cattle are highly vulnerable even where the AHLUs are not excessive (e.g. 25 – 50 units).
These types of events sometimes follow significant rain events such as cyclones when poor weather conditions are followed by hot, humid and still weather.
You can keep informed of this type of alert if you have your weather station hooked up to Kite. You will get an SMS* warning if triggered.
There are three levels of risk as defined below:
- Moderate Rapid HLI Event: Change in HLI of greater than 40 units in 4 hours (or less)
- High Rapid HLI Event: Change in HLI of greater than 40 units in 4 hours (or less) and the HLI reaches 90 to 100
- Extreme Rapid HLI Event: Change in HLI of greater than 40 units in 4 hours (or less) and the HLI reaches over 100
Feedlot cattle are very susceptible when they don’t have the opportunity to dissipate their accumulated heat load during the night or have the opportunity to recover sufficiently and enter the next day with a pre-existing heat load. This is reflected as a ramping up of AHLU over subsequent days.
You can keep informed of this type of alert with an SMS* when any day over the next seven days exceeds an AHLU of 50 units (this corresponds to a high risk with pant scores greater than 2).
There is also a time effect, (i.e. the number of consecutive days that cattle are exposed to AHLU in excess of 25, even where they receive nighttime relief). This appears to be a major determinant in terms of susceptibility to the effects of subsequent excessive heat load events.
In this case, it’s recommended that you look at your Cattle Heat Load Dashboard in Kite, and if 3 of your cards (i.e. days) show a medium risk for the AHLU (excess of 20 units), you should consider some risk mitigation measures and that you closely monitor your cattle.
* SMS alerts are available for Standard and Premium subscriptions.
Have You Been Paying Attention To What Your Animals Are Telling You? The importance of cattle observations.
As the riskier month of the warm season approaches, another important factor to consider when managing your cattle heat load is cattle observations. Read more.
The team at Katestone is very happy to announce that we reached another milestone today: the release of the Kite Feedlot Mobile App! Find out how you can access it.
The weather forecast is used in the calculation of both the HLI and AHLU for every site. But how important is it that the calculations use an hourly forecast in comparison to a daily forecast?