I have used Nature's Variety Grain Free for over a year, Vegas did have a problem with the chicken too! I use the Salmon and he does great on it. He was a mess with allergies too until I did the food change, he was on Iams the first year of his life. Just watch the chicken flavors. Although the cost is high the food does last a lot longer due to not feeding as much because it is not full of filler. Vegas is 2 and gets one cup in the morning and one cup in the evening, with a bedtime snack of either fruits or veggies. I personally love Nature's Variety.