We don't usually bother with lights, but have had ferrets with numerous eye exams, and sometimes run a flashlight for them. Turns out that almost all we've known over the last 18 or so years LOVE having lights shown in their eyes. Really ENJOY it BIG time (Bill-the-ferrets'-demi-god-who-won't-admit-it pun intended). Strange -- but then we are talking FERRETS! :-) [Posted in FML issue 3106]