Petfood Industry - December 2013 - 48

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Research Notes

Key concepts
 Potato as a fiber
source in dog
foods
(J Anim Sci online,
September 2013. doi:
10.2527/jas.20136842) Potato fiber
could be a functional
dietary fiber source in
dog foods.

Potato as a fiber source in
dog foods

In this study, potato fiber was evaluated as
a potential fiber source in dog food. The fiber
contained 55 percent total dietary fiber, 29
percent starch, 4 percent crude protein and 2
percent acid-hydrolized fat.
For the in vivo experiment, 10 female
mixed breed dogs were provided five diets
with graded concentrations of potato fiber. In
vitro digestion revealed that raw and cooked
potato fibers were 32.3 percent and 27.9 percent
digested enzymatically, respectively, while in
vitro fermentation showed that the fiber was
fermentable through 9 hours. Raw fiber had greater
acetate, propionate and total short-chain fatty acid
concentrations at the 12-hour time point compared

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with cooked fiber. There were no differences in
apparent total tract DM, OM, CP, acid-hydrolyzed
fat or energy digestibility of diets containing graded
concentrations of potato fiber. Overall, linear
increases were observed for all individual and total
short-chain fatty acids, with a concomitant linear
decrease in fecal pH with increasing dietary potato
fiber.
These findings indicated that inclusion of potato
fiber elicited favorable fermentation characteristics
without negatively affecting nutrient digestibility
or stool characteristics, indicating that potato fiber
could be a functional dietary fiber source in dog
foods.
Source: M.R. Panasevich, 2013. Potato fiber as a dietary
fiber source in dog foods. J Anim Sci online, September
2013. doi: 10.2527/jas.2013-6842.

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