After attempting to take a few more pictures of Katie in the early evening light while I had her standing on our front lawn and not being happy with the results, I led both her and Sadie back to our front door to let them inside. While Katie was standing there, waiting, I took one snap and hoped I could at least get a bit of eye color to show up.
Most of the time her eyes look like a couple of black holes in her face. And if you try to compensate for that by opening up your aperture more, you'll overexpose her white fur too much.
I really cropped closely around her eyes, and used an adjustment brush to lighten them to make them a little more visible. At first I thought I should add a little warmth to eliminate the bluish tint (it comes from standing in the shade) by increasing the white balance temperature but I thought, nah -- I liked it better this way. I also sharpened her eyes and the area between them a little, but not too much.
Katie is coming along nicely: she weighs nearly four pounds more than after losing her leg. She barks at the inivisible mailman, sometimes claws us with her leg, and leaps into the back of our van when she goes for a ride.
Speaking of rides, I have another picture to share...
(Shot with the Nikon D600 using the 50mm f/1.8 lens; aperture-priority, with aperture set to f/2.8; shutter speed 1/500 second at ISO 800; center-weighted; auto white balance; shot in RAW, converted to DNG and imported into Lightroom.)