Strava

All good if you put a picture of the dog on your profile and write it in the profile description - when you've given it that much transparacy, then it's easy for the de-throned to just flag your run and you'll be taken off the leaderboard.

Oh god, I see. I thought you were worried because she was using your account and you thought that people might think that your CRs were suspect and etc etc. Sorry, my brain shuts off at about 3pm on Friday afternoons.

Strava needs a "pet" setting so people can see whose dog is best on their own leaderboards.

Her CRs are legit. She's not breaking any Strava rules (drafting, dangerous intersections etc - I assume).
I agree with Thuekr - just wait for the dethroned to flag.
Only a psychopath would look into those eyes and do that though.