I've been experimenting with video settings on my Canon 550D, and I recently got an adaptor so I can use it with an old Olympus 300mm f/4.5 lens that was sitting around gathering dust. Here is a little clip I shot from the bedroom window. The chicken house is 40 yards away, but with the crop factor of the APS-C sensor I'm getting the equivalent of a lens of 450mm or so.
I'm pleased with the result - the colours look natural even after I've boosted the saturation and added a bit of S-curve in Hawaiki Autograde.
As for Barnaby, he's a complete hooligan. I'm going to try putting up a few short sections of low fence in the hope of keeping them apart, or at very least giving the chickens a head start when he gets a mood on.