You cannot use PZP to take a herd from 450 to 280 without sterilizing the mares.
If the death rate was 6% per year, typical for wild horses, you’d need eight years of nonstop darting.
If any foals were born the death rate would need to be higher.
If the death rate was 8% per year, unusual for wild horses, you could do it in six years.
Sterility sets in after five years.
Given that the program has been active for six years, maybe closer to seven, the death rate must be at the higher end of the range.
Are they spiking their darts with some other toxin?
It’s not about the horses. It’s about pesticides and convincing the bureaucrats and ranchers that the helicopters can be grounded in favor of mass sterilization.
RELATED: Salt River Herd Cannot Recover from a Deadly Disease.
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