Why is establishing a self-sustaining herd of beefalo often logistically difficult?

Answer

Early-generation male hybrids often suffer from sterility

The biological mechanics of crossbreeding bison and cattle frequently result in fertility complications. Specifically, males in the early generations of these hybrids often lack the ability to reproduce. This condition of sterility presents a major hurdle for ranchers attempting to maintain a self-sustaining population without constant and costly external genetic input or intervention, making large-scale herd management complex and unpredictable.

Why is establishing a self-sustaining herd of beefalo often logistically difficult?
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