Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to choose food for your border collie [title] Observe your dog's activity level. [step] Your border collie will need a wholesome, high-protein nutritional diet that is appropriate for its activity level. Border collies are working dogs, and they typically have higher nutritional needs than other breeds.

Ending1: Pay attention to your border collie's overall activity level throughout the day. [substeps] Run your hands over your border collie's head and body. Ending2: However, each border collie has a different activity level and receives various degrees of exercise. You should always consulate your veterinarian when determining the best options for your border collie based on its activity level. Ending3: [substeps] You should try to identify what your border collie is eating so you can ensure that your german shepherd has it. Although many border collies' appetite is determined by their size, in some instances they will want to eat more or less. Ending4: It may take weeks or months to get your border collie to eat a large amount of fresh fruits and vegetables daily. [substeps] It can take a while for your border collie to be able to do this with only one large slice of fresh fruit and veggies.

Answer format: ending1/ending2/ending3/ending4