Harrold, Daniel, Richard Saunders, and Jennifer Bailey. “Dietary Putrescine Supplementation Reduces Faecal Abundance of Clostridium Perfringens and Markers of Inflammation in Captive Azure-Winged Magpies”. Journal of Zoo and Aquarium Research 8, no. 2 (April 30, 2020): 114–123. Accessed May 4, 2024. https://www.jzar.org/jzar/article/view/456.