I was told to put Kitty Litter in my new speaker stands. Was he joking?

I suggest using osmium shot or pure iridium. If not fill your stands with mercury. If you have any mercury left over mix it with equal parts vodka and lime juice and drink it while listening to the results of your labors. 

I think stuffing kitties themselves into the stands will be more effective at damping harmonic resonance but you may start getting some howling feedback...

Originally I used lead shot, is this still viable option,love AUDIO

Tacky cowan217

A friend of mine suggested rice. Another friend tried it, with good results, so I did the same. Plain ol' white rice, though I don't think it much matters. Very inexpensive, as well. If humidity is an issue with this choice, or cat litter, it'll be one only in a more humid climate. 

If going with cat litter, make sure it's unscented. If it is scented, your cat/s might take an interest in sniffing around it, and, well, you get the picture.