Nature's Variety No Grain Kitten Free-Range Chicken

Out of all the cat foods I've tried, this is the one they like the most, but one of my cats must be intolerant to something in it because she vomits it every now and then. Generally, they prefer it over others, and I don't have issues with diarrhoea, maybe just the odd case. However, I don't start my kittens on this, because switching from mother's milk to this food doesn't sit well with some of the little ones.