Actually, having had a large number of cats on low-grade, medium-grade and high-grade foods, and using a number of different litters, PLUS actually tracking the amount of litter used, I can say that the above is false. About four years ago, when I had my group of cats plus a number of foster cats (usually totaling around 15 cats in the house at a time), I actually did track for a several months what the litterbox usage was, plus how often I had to change certain litters.Originally Posted by yiplong
This is wrong because litters don't get used up. When we change litter, 90% of what we put in were still there, but they just don't smell as fresh. Even a house with 2 cats will not use twice as much litter as a house with 1 cat, having one more cat will just use up a little more litter, this is obvious from economic of scale and personal experience. Higher quality food result in litter saving not b/c the cat poop less, but because cat excrements usually don't smell as bad.
For a while, I had been feeding my cats a medium-grade food and the fosters a low-grade food. When I switched to feeding all cats a medium-grade food, the total amount of litter used (scooped out of the box) was significantly less than previously - not half, but about 70% as much, representing 30% less litter scooped out in a given week. I paid attention to this because a bag of garbage put on the curb could not be over a certain weight or the sanitation department would refuse to haul it away.
In addition, the lower-cost/lower-quality litters needed to be dumped and changed more often. The cost analysis I was actually trying to make was as to what litter was most economical. With the lowest-quality scoopable litters, I would sometimes have to change out the box every five days. With World's Best, which was one of the most expensive litters, I would have to change out any particular box about once every 3-4 weeks - as you can imagine with that many cats, I had several boxes. Plus, the World's Best was not useless at the end of that time, I simply hadn't been adding to the box as litter was used up and the levels got too low - I would then dump the remainder into another box that was also partially-full and clean and refill the first box. I wish I had kept the spreadsheet showing $/box to fill, number of days between refilling, and $/week to sustain the litter usage, but I did not. However, the most expensive/lb litter came out to being the cheapest to use.
The explain the McDonald's dollar menu. There is nothing on that menu that is remotely healthy for a human being, yet it is cheaper than healthy food. It's pretty well documented that when people eat cheap, nutritionally devoid crap they then cost a lot more in health care, far off-setting the food savings.Originally Posted by yiplong
It is actually inherent in a free market that cheaper product is almost always economically cheaper, but more expensive ones might have other benefits. So when everything is considered, on average, there is no difference between expensive and cheaper food.
With as many cats as I feed, I do a cost analysis any time I am considering changing their food. I find the kCal/cup, feeding guidelines, price/lb, consider any specific health needs of my cats, and do the math. And when I switched from Deli-Cat (ultra-crappy) to Science Diet (just normal crappy), it did cost me some more money, though not nearly as much as treating my cat with kidney failure that was attributed to the previous crappy food. And when I switched my group from Science Diet to Felidae (medium-to-high quality), I did the math and it was actually cheaper per day to feed the Felidae.
There are switches that can be made to increase quality that do not necessarily have cost savings. I personally believe that if it can be afforded, pets should be on teh highest-quality diet possible. Just as I am healthier on healthy food, so are my pets. But do not discount that some switches are both economical AND beneficial to the health of the animal.