Originally Posted by MMS
Actually, raw foods (at least vegetables, I can't say that I've ever tested the theory with raw meats on myself) digest MUCH faster than cooked foods. This is because they are far easier to digest. Cooking foods changes them on a cellular level. Have you ever eaten a meal of just raw vegetables or fruit? How long did it take until you were hungry again?
Carbs and proteins also digest at different speeds. Carbs digest much more slowly (which is why you feel fuller longer when you eat a hamburger with a bun, as opposed to just a plain burger, for instance -- even the cheap, crappy white bread will digest more slowly than meat). Then you also have to take into account whether it's a simple carb or a complex one, and blah blah, yipp-a-dee-doo-dah.
Add in the fact that dogs have a completely different digestive system, designed to process raw meats very effectively and carbs not so much, and we're talking almost a-whole-nother ball game.
A few things on this. For one ziwipeak is processed, it may be processed gently and at low temps but still. I feed the stuff when i'm out of raw and use it as teats and it certainly looks processed to me! So we are not talking about giving kibble and a piece of raw chicken here. Ziwipeak is not the same as a raw diet, it is a high high quality processed food that is nearly as good as raw and is based on the same meat based principals as a prey model diet but it does not = a hunk of raw chicken. I would not think twice feeding ziwipeak mixed with kibble.
Secondly I tend to side with brodysmom on this one. Is there ANY scientific evidence that these things digest at different rates? Or of they do that it is a problem? Perhaps the sugars in these items metabolize at different rates but that does not equal to movement through a dogs digestive system. If this is true and a problem then why do they not tell people to eat one meal of meat and one meal of carbs and one meal of veggies and one meal of fruit? The reason you feel less fulfilled when you are not full of carbs is because carbs are a valuable resource for your body and you crave them (thank you hunter gatherer cave people for evolving bodies that make us crave unhealthy things).
Thirdly cooking things makes some foods easier to digest and some foods harder to digest. This is true with people and dogs, so no blanket statement about that can be made.