Well, I've been doing some research. The most likely odor culprit is butyl mercaptan (n-butylmercaptan). The antagonists for this include acetone, acids, and strong oxydizers.

So...you can get acetone at the paint store. Buy at least a gallon of acetone, and while you're there pick up a gallon of muriatic acid. The next ingredient is the hardest: liquid oxygen.

Bring 'em all home, mix well, and bath dog in mixture.

Or just get some liquid oxygen and some red fuming nitric acid....

If you can't get liquid oxygen, use liquid air.

You might possibly find downsides to handling this stuff....