[GrinningFool]

> Where "without any ill effect" includes tooth decay, obesity, and death from kidney damage among others.

Tooth decay: giving your dogs something hard to chew on is essential if you don't relish the idea of brushing your dogs' teeth. If they're not gnawing on actual bones, their teeth aren't get cleaned. Hard chew toys are a good substitute. The only dog I've had with tooth troubles didn't like chewing hard things.

Obesity: that's not a result of an unvaried diet, that's a result of eating too much and/or not enough exercise for the amount of food being given.

Kidney damage: I find it's surprisingly hard to find unbiased information around this that isn't published by pro- and anti-commercial dog food organizations. Even within that subset, documented facts seem rare, and articles read more like scare advertisements to encourage $PREFERRED_FEEDING_METHOD[1]. Anecdotally: after six dogs and three cats that have all lived somewhat to significantly longer than the breed average life span while being fed largely the same food for their entire lives... kidney troubles have never been a problem for us.

1.The closest to consistent info that I could find were statements that high vegetable protein content can cause kidney troubles in older dogs. Even these only showed up on a) "Feed your dog all natural" blog-type-things, b) specialty dog food sellers/manufacturer sites, c) copy lifted from these places largely verbatim and deposited onto other sites.

[tomcam]

> kidney troubles have never been a problem for us.

Congratulations on your robust good health! How about your pets?