I've been living with black bears for twenty-one years, and before that I dealt with them in the state parks where I used to work. Bears will eat everything! They are always hungry! Opportunistic, they will eat anything they can, including plastics and motor oil. Present them with unguarded chickens, hello McDonalds!
Trust me, I've learned from experience, having had them destroy my infrastructure on numerous occasions, and actually charge me and attack as I barricaded myself in my run with my chickens, nothing short of hot wire and bear spray will deter them.
Hot wire is relatively inexpensive and easy to rig, and it's the only thing that will protect your chickens unless you want to stand guard with a gun and pepper spray 24 hours a day.
Trust me, I've learned from experience, having had them destroy my infrastructure on numerous occasions, and actually charge me and attack as I barricaded myself in my run with my chickens, nothing short of hot wire and bear spray will deter them.
Hot wire is relatively inexpensive and easy to rig, and it's the only thing that will protect your chickens unless you want to stand guard with a gun and pepper spray 24 hours a day.