I'm not talking genome. I'm talking strictly about the digestive system. Sure the digestive system is not identical, but is a lot closer then to herbivores.
Dogs and people both have incisors canines and ridge molars. They both have a vertical motion jaw for tearing and crushing. Stomach capacity and empty time and other functions are similar when comparing to a dog of the same size anyway. Colon and gallbladder function are similar, as is digestive activity. Both are intermittent feeders rather then continuous like herbivores.
Also the ratio of the human digestive tract is 5 to 6, not 12.
Your small intestine is by far the longest part and is only twenty some odd feet long. Add mouth to mid abdomen to that, plus your colon which goes from the end of the small intestine and wraps up and around and back down to the rectum. Plus a couple feet for the bendy bits on either end of the stomach and that's about it. The dog's is just a little shorter, about 5 time longer then it's body. It's small intestine ratio is just a little smaller then ours as well. However the ratio of the small intestine to the rest of the digestive tract in both a human and dog are just about identical.
Now lets take a sheep for example, it has a digestive tract more then 25 time the length of it's body. It has a rotary jaw with a grinding motion. No canines, more then double our stomach capacity and it never empties. They are also a continuous feeder. They have enzymes that can digest the cell walls of plants and we do not.
I am unable to find good details about the gorilla digestive system, but I can tell you that it is much larger then a humans because they are nearly herbivorous apart from insects and such. Just look at this gorilla, it is not obese, that it's natural anatomy.
http://www.mikekaplan.com/pictures/view ... &UID=10167
In addition I have another link the vegetarians should click.