I guess for us it has been a matter of convenience. Over the years our BC's have usually performed really well at agility comps and won heaps of dog food, ranging from poor to high quality, depending on who was the sponsor. We did not have to buy much in the way of food for them.
At one of our annual national events one of the dogs won 70 kilos of Royal Canin.
Running the kennels now, we use ProPac and Earthborn and it's easy to just grab a bag out of stock. Both brands are super premium and we match the dogs with a suitable variation from the range.
Border River Pet Resort