There are 7,000 livestock entries at this year's Royal Welsh Show - from rare breed sheep to huge commercial beef cattle. Anna Hill meets the farmers with a passion for showing their animals including a sister and brother pair who've picked up rosettes for their Welsh Black Cattle. We also hear from a scientist who grows duckweed on slurry with the aim of producing a new source of protein for animal feed, and quiz Wales' Shadow Rural Affairs Minister over water pollution, bovine TB and funding for farming. Presented by Anna Hill Produced for BBC Audio in Bristol by Heather Simons and Beatrice Fenton