I've got an itchy kitty and the vet thinks it might be due to fish oil sensitivity. I've been feeding Shadow Evo 95% chicken and turkey for some time but recently she's started scratching her ears bloody. Nothing has changed in the house in terms of cleaners, litter, etc. so I'm going to try switching foods - does anyone have opinions on Merrick's Before Grain 96% turkey or Wellness Core chicken and turkey? Thanks.