Feed efficiency
Farm animals eat, and they also produce food. Feed efficiency refers to the ratio of output (food) per input (feed).
There are a few ways to quantify outputs and inputs, such as
- total mass
- dry mass
- calories
- protein
Within each of those, one might also specify whether we're talking about
- all material, or
- just the proportion that is human-edible
Lastly, we could specify whether the inputs & outputs are
- over the full lifetime of the animal, or
- just during some particular time (such as a cow's months of lactation).
From this, there are technically 128 different ways to measure feed efficiency - which is way too much! This page is meant to be a table for the most important ones.
Numbers
This will be filled in soon.