I've not heard of it.

I hope it helps her Wallace! Often, food allergies in dos will include chicken. So this may be a step in the right direction, but she may need to try a bison / venison food. I just opened the first bag of Taste of the Wild High Prairie, which is bison, venison, and sweet potatoes (among other things) and totally grain free. The struggle to find a food which agrees with my Sugar continues.