Carol, cat manure is not wise to add to a compost pile, even a hot one. I
suspect that if you get the pile to 150 degrees, it is okay, but cat poop
does have some pathogens that can harm humans if not killed; I would not
use it in my piles. Dog manure is okay, but I would rather have a cat.
Don't know about the new kitty litters, but regardless of how hot your pile
is, I would not use cat (or dog) manure in it. I've heard too many horror
stories of disease and parasites being transmitted through cat and dog
feces.