Has anyone ever used blood hounds to find a lost cat?

Our cats ran way 2 weeks ago. We have taken all the typical measures to look for them, flyers, signs, talking with neighbors, looking extensively in yards, etc. Now we're thinking about entering the big leagues and hiring dog sniffers to find them. Has anyone ever tried this? Does it work? Is it worth the money? Any advice is greatly appreciated, thanks!

Two weeks, it is rather late for that...

but otherwise, surely an useful idea. Especielly if the cat is usually indoors cat, thus no bewildering traces en masse.