Effect of commercial medicinal feeds on the physical and chemical properties of urine Olga Vorontsova, Nikolay Pudovkin, Vladimir Salautin, Tatyana Prokhorova and Andrey Terentyev E3S Web Conf., 175 (2020) 03009 Published online: 29 June 2020 DOI: 10.1051/e3sconf/202017503009