You should choose dog food suitable for your Border Collie based on its age and physical condition. Dogs between 2 and 12 months old need to eat puppy dog ​​food, and dogs over 12 months old can eat adult dog food; It is best to choose dog food that is less oily, contains less salt, less additives, and less preservatives, so that your dog will be healthier after eating it. You can also give your dog some egg yolks, chicken, beef, vegetables, fruits and other foods to help your dog supplement nutrients and vitamins.