Brief: Taurine is an amino acid which can only be found in animal protein. It can be synthesised in dogs from the precursor amino acids cysteine and methionine. It is not present in vegetarian protein sources such as grains and/or legumes. ACANA Lamb & Apple Singles formula uses FRESH and RAW lamb meat as the first ingredient and contains WholePrey ratios of meat, organs and cartilage. Of the 27 percent protein in the ACANA Singles foods, more than 85 percent comes directly from the meat and organ inclusions, which are rich in taurine.