The reason I ask is I have always given grain-based food to my dogs because thats what easily available. I have a ten-year old dog who has suffered from crystals in his urine and stones (had them removed earlier this year) in his liver. The stones were jagged and were cutting into him and making him bleed and get sick all the time. Trying to pee crystals probably is no joy either.
My vet said the PH of his urine is what was causing the crystals and the stones. So he put the old boy on Science Diet prescription dog food that is supposed to help with the crystals. He would eat the stuff for a while and then stop eating and then we would have to try another Science Diet prescription food with a different letter until he wouldn't eat that any more. Like he knew the food was making him sick. Might have been upsetting his stomach too? I mean even us if we get hungry enough we will eat our own leather shoes even though we know we may not feel too good afterwards. We would still eat them if we got hungry enough.
After reading some stuff I have concluded that either the grain or the gluten in most dog foods, including the Prescription Science Diet was what was making him sick. He would avoid complete meals. Run in the other room like he didn't want anything to do with the stuff. Its like he would finally get hungry enough (probably starving). to eat these types of foods which he knew were making him sick but he would still eat it because its all he had. Until he finally couldn't eat it any more and would stop eating. He was losing weight through all this too.
So after the surgery a friend suggested switching him to a grain-free, gluten-free diet. My old boy loves eating again. I can tell he is feeling better already. And this is after only a few days.
Anyone else went through this?
Don
http://www.thepetcenter.com/imtop/contrast.htmlContrasting Grain-based and Meat-based Diets Fed To Dogs and Cats
It is common knowledge and generally agreed upon by experts that dogs and cats are meat eaters and have evolved through the ages primarily as meat eaters. Although now "domesticated", our pet dogs and cats have not evolved rumens along their digestive tracts in order to ferment cellulose and other plant material, nor have their pancreases evolved a way to secrete cellulase to split the cellulose into glucose molecules, nor have dogs and cats become efficient at digesting and assimilating and utilizing plant material as a source of high quality protein. Herbivores do those sorts of things. That’s how Nature is set up at this time.
On the other hand, some plant material such as rice, soybean meal and corn have some, although limited, usefulness in the meat eater's diet. Corn, wheat, soy, rice and barley are not bad or harmful to dogs and cats. These plant sources are simply not good choices (we do get to choose what we feed our pets, don't we?) for the foundation of a diet to optimally nourish animals what are, have been, and for the foreseeable future will be meat eaters.
What is the difference between grain based and meat based foods for pet dogs and cats? If you don't believe that dogs and cats are primarily meat eaters, you might as well click away now because you certainly won't believe what follows. Most of what is presented next has been derived from two excellent references on small animal nutrition: