Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to stay updated on dog vaccinations [title] Identify essential vaccinations. [step] There are some vaccinations that all dogs need to receive. These vaccinations prevent highly contagious diseases that are a health risk to all dogs.

Ending1: The most crucial of these are endoscopic vaccinations. With endoscopic vaccinations, your dog will not develop certain immune systems that can interfere with the breed's ability to go through other vaccines. Ending2: Accordingly, you should keep a list of them in your smart phone or on your computer. [title] Keep your dog separated from other dogs. Ending3: For example, all dogs must get both a distemper and rabies vaccination. The distemper vaccination is called dhpp because it is a combination shot that protects your dog from distemper, hepatitis, parainfluenza, and parvovirus. Ending4: If your dog's disease worsens symptoms, the dog may become one of the most common vaccines for your dog. [substeps] Talk to your vet about the dog's specific additional vaccinations you want your dog to take.

Answer format: ending1/ending2/ending3/ending4