What is the relationship between animals gathered, animals returned, animals shipped and animal deaths? Draw a box around the traps. The animals going in should equal the animals going out. Mathematically, this would be expressed as
∑ Animals in = ∑ Animals out
That is,
Animals gathered = Animals returned + Animals shipped + Animal deaths
The formula can be manipulated algebraically to solve for any one of the four terms.
Refer to this roundup report from the Shawave HMA for an example of the calculation.
What about the number of animals removed from the HMA? That would be equal to the number of animals shipped plus the number of animal deaths.
Western Horse Watchers Association 