This is our 15 year old terrier mutt. She's quite the challenge to photograph. If you get too much light in her eyes, they glow solid green. not enough and you'll never see her eyes at all because the dark fur and big eyebrows. The black fur really draws in the light too. A bounce flash seems to produce the best results.
On a sadder note, the vet told us yesterday that her kidneys have pretty much failed and she's only got a couple of days left. We've got some great photos and memories to remember her though. It's hard enough on my wife and I (we got her as a puppy from my folks shortly after we were married) but explaining it to my 5 year old is even harder.