toilet trouble

About to own my very first Sphinx and wanted to ask if the stories of their poops being the worst is true? I have heard some people say their entire house will smell after their poops.

So after having tried everything, moving the litter boxes, 8 different varieties if litter, a trip to the vets to rule out infection, I'm am still stuck as to why my girl sphynx (bindi) is still weeing everywhere. She has been spayed and although I thought that stopped the problem temporarily we...