FLDD's?

That would stand for Freon Leak Detector Dogs. Are there any? Is it even possible to train one?

I do not ask these questions idly. For SIX YEARS we have been struggling with a/c problems due to freon leaks that somehow our a/c servicing company can never find -- or, if they do find one, another springs up. We are now on our third compressor -- and there is yet another leak. If our service company can't find them, could a detector dog do it (assuming it would be safe for the dog. I have no idea whether or not would be the case.)?