I don't live in the US but up where I am from we have a lot of predators, eagles, bears, foxes, wolves, hawks, mountain lions, bobcats and lynx, those to just name a few. I racked my brain for several months on what to do with the coop because of all the predators I was afraid I would lose my flock rather quickly like a lady I know down the street. So I took a section of the barn and enclosed the inside and made a door so I could access the insdie of the coop. I then made a door leading outside for the chickens and fenced in a very large area between the dog and horse pen. So I got my horses and the dogs protecting my flock at all times. However I know you may not have horses or dogs and it may not be practical for you to move your coop. So Without even having the protection of the other animals I made sure that the area in which the chickens are in is sturdy enough that nothing will get through. except unless a bear really wants in, nothing will really stop him or her. I used chainlink all the way around the pen. I buried about 2 feet of tin into the ground to discourage foxes and other predators who will try to dig down. For the top I made a sturdy wood frame and fenced in with equine fencing ( I used this for the bogger predators who will go through the top not the bottom) and then added a layer of chicken wire to stop predatory birds and smaller predators from getting in. oh I should mention I also added bear bells in several sections of the fencing so if an animals touches it the bells go off and scares them away. Something else you might consider it a motion detection light in the pen. I've never seen a raccoon where I am at. but I know they are great climbers and very smart. If you have several raccoons already chances are after you get rid of the ones you already know are there, more will follow eventually. your best bet is to fool proof your pen and bring them inside the coop at night to avoid further loss. I am sorry about your loss and I hope you find a quick solution.
