Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to brush a dog's teeth [title] Get a dog toothbrush. [step] There are a wide variety of toothbrushes to choose from that are designed for dogs. They are available at any pet store.

Ending1: Buy a brush that is strong enough to hold your dog's teeth in place. If you choose a more aggressive dog, then get a brush that is designed for a dominant dog such as a miniature schnauzer or cocker spaniel. Ending2: [substeps] Talk to your veterinarian about what type of toothbrush your dog will need to have. Take your dog to the vet if you think it might need a tooth brush. Ending3: Consult with a person or owner about which model is best for your particular breed of dog. [substeps] Be sure to get a foam or silk toothbrush to clean your dog's teeth. Ending4: [substeps] Dog brushes have softer bristles and are designed to give you easier access to those hard to reach areas. Choose a brush based on the size of your dog.

Answer format: ending1/ending2/ending3/ending4