re: 5' chicken wire should do it.
Nope, nor will an electric fence. Bobcats are tenacious, very intelligent and cunning.
Having dealt with repeatedly them over the years I've discovered there isn't much that will keep a Bobkitty out of the chicken coop, or any other place where there's fresh meat.
PS, they consider house cats a delicacy, small to medium sized dogs a plaything, and god have mercy on you if you piss one off.
I'd honestly rather wrestle a Cougar than a Bobcat, they're meeeeean