Food Recommendations for allergic dog

Wow, it's been a while, df.

I am hoping for some food recommedations for my loveable 4 year old chocolate lab, Rosie.

She has always struggled with allergy issues. She has been on and off prednisolone and benadryl. About a year ago, I started feeding Natural Balance Duck and Green Pea and she did wonderfully on it. Her fur looks great and she has been healthy. In the past few weeks, she showed less and less interest in it. She keeps doing the "I'm hungry" barf, but still won't eat it. I thought it might be good to buy the same formula but in a different flavor. I mixed it in with the old and she inhaled it last night, but ignored it this morning and this evening. for the first time she seemed sickly this evening. She was lethargic and disinterested until i gave her chicken and white rice. She ate every bite and is looking for more. Ever since, she has been back to her old self. I made a vet appt for tomorrow night, but it seems like I may not need it. I am keepinga close eye and will decide when I get closer.

Basically, this experience makes me think that the Natural Balance is her issue. I am wondering what a good alternative would be that would be good for her allergies. If I could I would feed her chicken and rice, but I worry about her allergies. Does anyone have any recommendations for an allergic dog in need of a change? I will do anything for this dog. If it means making home-made dog food, feeding raw, I am looking for anything that will keep her healthy and happy. I would appreciate any suggestions.