One of my Teddy Bears Itches, and scratches constantly, has developed some sores, yeast in ears, and odor. I feed Diamond Naturals, Lamb & Rice. Yes, it’s not the best, but it’s $36 for 40#. I’m a disabled Police Officer, single dad, so my budget is a concern. Any suggestions on a food that will help his itching? And not break the bank? Thx!