Abstract
Nutritional assessment of commercial vegan complete diets for adult cats and dogs and the evaluation of the products' legal labelling. Four complete vegan diets for adult cats and dogs available on the German market were analyzed concerning their nutrient and mineral content. The required amount of food was determined by calculation and compared to the manufacturers' feeding recommendation. Data labelling was assessed for its accordance with EC regulation 767/2009. The supply of taurine and vitamins was evaluated for its adequacy by use of the nutritional additive data on the product label. In most cases, the labelled data complied with the regulatory framework. The manufacturers' feeding recommendation differed significantly from the calculated feed quantity in 2 out of 4 feeds. The recommendations resulted in a coverage of 64 to 121 % of the total energy requirement, more frequently leading to an underestimation of the required feed amount. The supply of minerals exceeded the recommended allowance by 5.2- to 8.2-fold in the adult dog and by 9.0- and 11.4-fold in the adult cat. In 1 out of 4 diets, the European Pet Food Industry Federation guidelines were undercut for crude protein, crude fat and phosphorus. Zinc and copper contents were in excess and/or insufficient. A shortfall in National Research Council (NRC) recommendations was present for zinc content in one diet. Most products met the recommended supply of essential amino acids; 2 products only met the minimum requirements for methionine and cystine but not the recommended provision. The added taurine met the recommended intake in one commercial diet for cats. Requirements for vitamin intake were fulfilled by the nutritional additives in 3 products. None of the products fulfilled the energy and nutrient requirements for a complete diet for adult dogs and cats without limitations. Therefore, deficiencies in the supply of individual nutrients cannot be ruled out under long-term feeding of the examined vegan diets.
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