Target prepubescent fillies.
As noted on page 35 of a report distributed by ISPMB, a study by Knight & Rubenstein found that administration of the first dose of PZP before sexual maturity may cause infertility. If you can’t access the file, click here.
Can you think of a simpler way to make your pesticide dollars go farther?
One and done. Females who have not yet reached puberty, which occurs 12 to 15 months after birth, can be sterilized by a single injection.
The technique will be most effective in the early years of a darting program, when youngsters are present.
By summer, the herd will consist of 10 to 20 percent foals, and half of them will be colts.
So the benefit will be small but so will the cost and the idea of not having to stalk those mares for five more years is alluring.
In their desire to be respected by the bureaucrats and ranchers, and to replace motorized removal with nonmotorized removal, the advocates may already be doing this.
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