My doggie doesn't have bad breath. I wonder why...I'm not doing anything special. I haven't yet brushed his teeth. He doesn't chew on any bones, rawhide, etc. Just eats his food, Canidae kibble and raw carrots, green beans and the occasional piece of meat thrown in. I wonder if doggie breath comes from the stomach and upper intestines. Maybe in those dogs who have it, they are eating something that doesn't get digested properly or doesn't agree with them. Just a guess?