If Border Collie doesn’t like to eat dog food, you can change it to a different flavor of dog food. If the dog still doesn’t eat it, it is too picky and needs to be corrected by the owner in time. You can use the fasting method to make the dog eat dog food. You can also mix some meat, egg yolk, canned food, freeze-dried food and other foods into the dog food, so that the dog food will be more palatable. Try to feed your dog as little snacks as possible, and let your dog exercise more to increase its appetite.