What is a functional pet food ingredient?

What is a functional ingredient in pet food? Read below and learn more about what has been in Dr. Tim’s diets for years now. The functional ingredients in Dr. Tim’s Pet Foods include porcine plasma(anti inflammatory and immune system stimulant), beet pulp(moderately fermentable prebiotic and fiber source), chicory root(prebiotic) and probiotics that are applied after the heat of extrusion(healthy bacteria to help prevent disease). To learn more, please read this article http://petfoodindustry.com/Default.aspx?pageid=5306&id=46136&terms=limited+ingredient+kore