My boy Kirby appears to have an ear infection (or infections as it appears in both ears). He had an infection a couple months ago and it was a yeast infection. It looks like he is getting the same thing again. His ears look a bit red and there is brown gunk in his ears that I clean out daily. The vet said last time he was in that switching dog foods can cause yeast infections. I did just switch him to Chicken Soup dog food. Is there anything I can do to help prevent these infections? Do I need to switch dog foods again or will he adjust? Any advice greatly appreciated.