He said he loves her so why wld he kill her. Did u watch the video? He went through all of that hard work because he love his cows. He wld shoot his foot before he wld shoot one of his cows.
Next time When he catches her it would be easier to find her or leave her be to have freedom when she wants but at least know were to find her w if needed if he gets the cow microchiped or give the animal some type of other tracking device.... then he will always know the location if good with technology and once known he can watch and learn were she goes frequently then plan his captures a little easier
Every living thing does but at least if he's that desperate just give her a tracker and leave her alone at least he'd always know were she is ....but yes freedom complete freedom would be better