All of the cats back then are outdoors though. I remember at least one female cat (our cat) live around 10 years. I don't remember how long other cats live though.
So far I have not notice any changes in water intake or urination with my cats. Not much variations in the amount of clumping litter I removed everyday. My cats live indoor but the oldest did live indoor & outdoor for a while before finally indoor again.
I'm pretty much in the same camp. What really work for my cats is rice mixed with boiled fish. The results are good bowel movements & no vomiting. Since I'm a "modern" cat owner, I always prefer more balanced nutrient pet food of course. Basically at the beginning I feed my cats kibbles in the morning & rice mixed with boiled fish in the evening. However when I started to stay with kibbles for both meals, my cats started having diarrhoea & vomiting. I changed the pet food a couple of times, because I'm pretty committed to balanced nutrient pet food, until I found one that worked for all of my cats. And it does contain rice in the ingredient.
As for wet/canned food, I can't find one that worked for all of my cats though. A couple of my cats will have diarrhoea when I feed wet food though. I have no idea why is that.
I never have fur problem with my cats. Of course if I didn't sweep or vacuum the floor for a week, there will be some clumping furs under the furniture and on the carpets.
In my opinion, pet food contain corn & rice & even by-product not necessarily bad. All "good" food is expensive to many people, especially that adopted many cats though.
I don't think byproducts are bad. After all, in the wild, cats eat everything, even their prey's stomach contents.