Datamars Livestock cloud software calculates Average Daily Gains differently for a Remote WOW system and a standard weighing setup. This is because of the influence of 'gut fill'.
What is 'gut fill'?
Gut fill is the percentage of an animal’s liveweight which can be attributed to the contents of its stomach. Gut fill can be affected by:
- water access and water quality
- time since feed and/or water access
- feeding levels and type of feeds
ADG Calculation for a standard weighing setup
With a standard 'static' weighing setup, an animal is stopped and weighed while standing still. The animal's ADG is calculated using the change in weight divided by the number of days since weighing. For example, an animal weighing 30 kg more than when it was last weighed 30 days ago would have an ADG of 1 kg per day.
ADG Calculation for a Remote WOW system
With a Remote WOW system, an animal is likely to be weighed multiple times in a single day with different levels of gut fill. In order to remove the influence of gut fill, the ADG is calculated using a three week (21 day) rolling average.
You might also be interested in: