Ohh, sorry, you said either USA or EU.. My bad buddy, and nope, i haven't, but when i went to Orlando, Florida on easter day this year, there were metal detectors, taking off shoes and x-ray machines and shit, not a dog in sight! Went from Heathrow, to Dallas Ft. Worth, then to Orlando, then the same journey (but backwards) on the way back (i know texas is further than florida, but it worked out the same price and we couldn't get a direct flight *shrugs*).

Not a dog in sight at any of the airports, you'll be fine, as long as a person can't smell it, you're all set!