Wow Mark I hope you get this situation under control soon. Luckily we dont have bears in my part of the woods though we do have a bobcat that lives down on the creek I see tracks from it after we get a good rain walking out back behind our coop already sent word to my brother who has tracked it and found its den now we have a lot of reports of mountain lions being sited throughout the area its all this new building they are doing in the surrounding areas I believe I curse those developers about 6 miles away they have slated a large portion of wooded land aprox 187 acres for a subdivision they are going to clear most of the woods away to build 24 homes such a shame. I cannot give you suggestions on how to deal with this animal as I have never had to expierience one but I would get someone to stake out your coop and kill it because it will keep coming back and wouldnt want to see any of the new birds you get to be killed.