Any new feces odor solutions?

Searching through old threads, I noticed this topic has been addressed before; nevertheless, I'm hoping there might be new discoveries since those postings.

I own two Tabby cats, both female, Bella and Sophia, both about three years old.  Bella is in excellent health, has what my vet thinks is an ideal weight (7.5 lbs.) and has never been a big eater.  Her coat is gorgeous and her temperment calm and loving.  I feed her and her house mate, Sophia, Iams hairball formula dry cat food.

The difference between the two cats is bewildering, especially in regard to their feces.  Bella, I have no trouble with; she's regular and clean.  Sophia's feces, on the other hand, although regular, are hideously rank.  She has a voracious appetite as well and is much heavier than Bella.  Like clockwork, she times her last BM of the day to correspond to my bedtime, which always forces me to get up to clear the air.

Is there anything I can give Sophia to deaden that god-awful smell?  I read one post that suggested feeding her meat as opposed to dry cat food which often has soy and/or other vegetables in it.  If there is anything else I should consider, I'd like to know.

Incidentally, Sophia has never really been good at covering her BMs like Bella is.  My latest attempt at getting her to change that habit was to place a cover on the litter box; but alas, she has not altered her routine.  I've read that kittens that are taken from their mothers early, such as may have been the case with Sophia, since I adopted her from the Humane Society, tend to not cover.  I chose her because she seemed most in need of an attentive owner.

Dave

Well, if you were eating a food that resulted in bloat, gas, you feeling hungry all the time, and really stinky bowel movements... you'd change what you're eating, wouldn't you?

That horrible smell is food not moving through her properly. She probably never feels "right" inside, and has gassy cramps and a constant tummy ache.

I'd consider a food that's more biologically appropriate for a cat: something high protein, with low carbohydrates.

If you want to learn more, this is a good place to start: http://www.catinfo.org There is a wealth of information on commercial foods to help you identify a better food for your kitties. As one kitty isn't so sensitive, transitioning them both to a new food shouldn't be a problem.

What comes out is directly related to the quality of food that goes in.  I'd look at changing her diet to a more high quality grain-free food and  feeding mostly canned and a little bit of dry.

We bought canned cat food, Sheba, and gave Sophia one can early evening yesterday, so we'll see how that goes. 

Poop will always smell like poop; we all know jokes about people who thinks theirs doesn't but we all get the joke, right?

However, fecal odor is related to how thoroughly food is digested.  Cats don't digest vegetable matter very well at all, so that will contribute to the strong odor.  Knowing that, one could pretty easily argue for an all-meat diet for cats. 

There are other problems that can contribute to the odor, among them intestinal parasited, general health, etc.  If you've eliminated all those factors, then food content is about all that's left.