Ignore everyone who says this is too small. It is just the right size! After all, that owl is really small, and the smallness of the photo emphasizes that. I do wish the focus was better.
It's hard to tell if this image is in focus, it's too small (you've probably already got a comment or two about this). These birds are much more impressive (to me) when the fence is not visible in the image.
You have a fanstastic subject matter here. My suggestions if you get a chance to shoot this again: try zooming in enough that you can't see the fence or utilize your aperture to 'make the fence invisible'. My other suggestion for voting is to make the image larger so that we can see detail.