Hi All, 
I'd like to offer two comments on this thread: 
1. My wife's cousin had a dog that was dying. She switched it to raw meat
only and it perked up and lived many more years. 
2. I have seen one dog choose raw meat over cooked meat but it may be
exceptional because it hunted some of its food and, from that standpoint,
was a little wild. He would only eat cooked meat when raw wasn't available,
and he turned his nose up at dry dog food unless he was very hungry. (His
bowl would sit, untouched, full of dry dog food for weeks at a time.)

Best Wishes, 
Ron Hoggan