I caught a raccoon in a trap I purchased from a local store. I was stunned at the damage he did to the cage during the night. He didn't manage to escape but the cage was no longer functional. When dealing with these critters get STRONG wire. Hardware cloth is the best.
I know. I lost my first little flock because one area underneath the soffit of the run was just chicken wire, the raccoon hung upside down and ripped it open. Now mine is all either double layer hardware cloth or chain link and hardware cloth. I gave my neighbor a dukes dog-proof trap last fall, but he didn't use it.