Just in case you were in need of such a thing......
This is the greatest thing since deodorizing litter:
The Our Pets WonderBowl Selective feeder
http://www.amazon.com/OurPets-WonderBowl-Selective-Pet-Feeder/dp/B00C1BYETO/ref=sr_1_1?ie=UTF8&qid=1408160857&sr=8-1&keywords=wonder+bowl
There, or at drsfosterandsmith.com (from whence I stole the picture)
Cat wears an infrared pendant key thingie and his/her private bowl opens just for him or her. We've had two of them - for Enigma and Jazz - for a few months now. And it actually works! Everybody gets their own food. We know who's eating what. Life is good. Donut still has a regular bowl. He was the one who was getting bigger while the girls were getting tinier, so he's not in need of reserved food.
I wish the pendant was smaller, but the cats don't seem to mind at all. It took a while to teach Enigma to use it, but she taught Jazz in an afternoon. Battery life on the bowl has been excellent. Battery life on the pendants has been OK, but to be fair, who knows what kind of ratty batteries they sourced as OEM. (our D-cells for the bowl, OEM 2032 for the pendant)