Asking for dog-safe advice!

I have nice shiny boots. My roommate's dog thinks it's acceptable to attack the boots while I'm wearing them. It hasn't actually hurt me so far (they're pretty good protectively), but it's annoying and I doubt it's a good precept. But I'm not writing this to complain, but to ask how I can get her to stop. Do you folks have any advice on dog-safe repellents I can put on my boots or other methods of getting her to stop?

Just not wearing the boots isn't an acceptable solution (though I've had it suggested to me). I need footwear on at least sometimes to get some things achieved, and those boots're my only real footwear.