Holden enjoys climbing his scratching post, shinning up it like a boy climbing a tree and then pulling himself up on the top. I guess, even although he can easily leap that high, the landing platform is too small.
In winter, there's good light through the southern windows, even with the Roman blinds down. (You know how to make a Roman blind? You poke them in the eye. *ba-dum!*)
I had the D3 with the 24-120mm f/4 handy. These were wide open at ISO 1600 to minimize movement blur.
