The Application of an Oral Zinc Tolerance Test to Assess Zinc Absorption From Three Different Dietary Sources in the Dog

This study investigated zinc absorption in dogs from three dietary sources using an oral zinc tolerance test. Zinc is crucial for dogs, particularly for hair growth, as 91% of the minimum maintenance requirement supports this function. The study found that zinc absorption varied based on the source and amount of zinc, as well as the presence of dietary antagonists like calcium and phytate. It was suggested that zinc supplied as a chelate with amino acids was absorbed more effectively than from inorganic sources, potentially overcoming the negative effects of dietary antagonists on zinc absorption.