It seems my newish little lady has multiple allergies. Not mild ones either - at her worst, she had open weeping sores on her paws and ears and was scratching, nibbling and licking herself 24/7. Her skin is now healing, fur growing back, and scratching has reduced to an almost-normal cat amount of scratching. She's eating James Wellbeloved grain-free turkey formula. That's it. No variation, no treats. Just that and water. I really hope this isn't all she can eat because she's a thin cat and she doesn't love it. She'll eat enough to stop her hunger, but you can tell she doesn't really enjoy her meals and really she doesn't have an ounce spare on her. She loves fish, but I'm pretty sure that's a major trigger.