I got the ever brainiac idea
to flush my Scoop Away Cat Litter (fecal) matter. Well long story short.. It didn't go over well.. Of course my husband was overtly ticked at em for the idea.. I thought why not.. That's what a toilet is for to flush poo and pee.. WRONG... It stopped it up. and the sand/litter is still on the bottom of the toilet.. We keep plunging it, and it's slowly going away..
So I'd honestly say dont' flush it,, unless it tells you too!