Yogi gets a manky coat and hot spots, gunky ears and gloopy eyes on any food apart from fish based food. Well my nan won a small bag of royal canin for itchy skin and its chicken based. I was waiting on my online order for food and had to mix this is with her old food whe we waited for it. Well there has been no problems like with other chicken based foods. Why is this?? Esp with all the other ingredients in royal canin that are not supposed to be all that good??