@PetMom,
This sounds too complicated to me. The easier and cheaper way is to train (heh) the cats by their each having their own dishes and that the dishes are not left out for all day munching. On training them to do that, I'm not conversant (we did that for ours, but it just naturally worked out - here are your dishes, eat up) but I remember reading about it and figure that much advice is available online, including probably in past threads here on a2k.
While we wait for others' opinions and advice (I'm interested too, including if advice disagrees with mine), here is a link to 267 a2k cat threads -
http://able2know.org/tag/cats/
Meantime, PetMom, welcome to the forum.