Lou, i've never had to work in an environment like you do because i've always worked with dogs but if i did I wouldn't let them bother me. In fact I'd put up even more pictures of my dogs, plus make them a screen saver, and the background of my computer.
some people are so ignorant and I do understand your frustration with them. Its very upsetting when other people knock what you love, even more so when what you love is a member of your family, fur or skin. I've had people say rude things about me before when I'm toting around Morgan in her carrier. I try to take the high road by ignoring them, but my big mouth usually can't help itself, and once that gets going my fingers (well one finger in particular) end up joining in the fun.