I am voting for raccoon also, let's look at the evidence:
--the perp reached through the wire to rip feathers off a rooster. This suggests very agile small hands (what kind of wire is this--hole sizes?) I think this would be difficult for a fox to do if the holes are not large.
--the perp moved a 4 by 4 post, this perp is very strong (once again, how large is this post, what is weight?). I think a house cat would have difficulty with that.
--the perp climbed into a tree and grabbed chickens. Could a fox really do that?
--the attacks all occurred between 4-6 AM, a favorite time for coon attacks. If the perp was a cat, I doubt he would only be a night-time hunter, same with dog.
Raccons may look lumbering, but I have seen them move extremely fast, and I have also mistaken a coon for a cat more than once.