How does a highly stressed or temperamental animal counteract the Fleckvieh breed's economic goals related to physical efficiency?

Answer

By sacrificing physical efficiency, putting energy into adrenaline rather than muscle or milk

A highly stressed animal often sacrifices physical efficiency by diverting metabolic energy toward producing adrenaline instead of necessary outputs like muscle growth or milk production, which counters the breed's economic objectives.

How does a highly stressed or temperamental animal counteract the Fleckvieh breed's economic goals related to physical efficiency?
cattlebulltemperamentFleckvieh