Squirrels in my owl box

I built this owl box 4 years ago, however I think the box is too low for owls, so these squirrels have taken up residence in it. It was early in the morning February 13th and there was light fog in the air, I had to use IO 1600 to get a shutter speed that would allow me to use the camera hand held.
Pentax K10D 75-300 f 3.5-5.6 at 300 mm ISO 1600 1/125 second at f/5.6 IMGP7444|690x461

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