My 2 dogs (not Border Collies) can't tolerate chicken, whether it's boiled or whatever. It really upsets their stomach. Yet they eat Chicken and Veg tuckertime, and one of them it's the only food she can tolerate and they both have grass/pollen allergies, but not food allergies according to the food trial (I think they do). They eat a lot of grass after eating chicken and their stomachs rumble and they are quite wiffy..