mudpuppy
Posted : 8/22/2006 2:02:01 PM
Then the dog has bouts of diarrhea and constipation due to the lack of water absorbtion in the colon that the fiber provides. They make up for this by adding pumpkin, which is high in fiber.
So if fiber (grains) aren't a requirement in the diet, why are so many finding it necessary to add pumpkin?
Unlike humans, dogs do not need fiber. Let's review: human eats food. It rapidly passes through the stomach. Takes some time to pass through the small intestine. Then the fibers are fermented by bacteria in the colon. If humans do not eat sufficient indigestible fiber to fill up the colon, it does not get stimulated to contract. The longer the food sits there in the colon, the dryer and harder it gets as the colon pumps the water out of the poop. Transit time through the human digestive tract is strongly affected by amount of fiber eaten. You can completely shut down the human digestive tract by not feeding fiber.
Dog: eats. Food sits in stomach for hours. Once it leaves the stomach, the food rapidly passes through the entire digestive tract and out the other end. Addition or lack thereof of fiber does not affect transit time through the digestive tract ( I can get you published studies proving this point-- fiber is irrelevant to the dog's digestive tract). Stool consistency is determined mostly by what is left undigested.
Dogs who eat a lot of undigestible fiber tend have big soft stools. Cheap dog food companies who put a lot of filler in their dog foods can only prevent diarrhea by adding certain "stool hardening" ingredients to their foods-- thus you get the big but firm poops that so many people feel are "normal" for dogs. Beet pulp and canned pumpkin are popular "stool binders". Dogs who eat too much in general tend to just poop it out the other end undigested-- diarrhea. Dogs who aren't used to variety in their diets also tend to not digest the new foods well, and so it goes out as diarrhea too.
Folks who feed nothing but meat (who are these folks?) are likely to just get small runny dribbles of poop since practically everything was digested. Folks who feed no-grain, no-veg, no-fruit diets, but feed meats and bone, find you can adjust the consistency of the poop by how much bone you add. The more bone, the firmer the poop. You know you have balanced your diet properly when you get small hard poops that don't smell, and don't leave smears on the grass when you pick them up-- without needing to doctor the dog's diet by adding pumpkin or beet pulp.