Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to socialize a new dog with your family [title] Start socialization as early as possible. [step] Puppies are particularly open to new experiences between 8 and 16 weeks old. If you've just adopted a new puppy, expose it to adults, children, other dogs, and as many new sights and smells as possible during that timespan.

Ending1: Do not be surprised if, at first, your new dog may get a little spacer and your new dog may get a little distressed on occasion. Allow for the opportunity to get acclimated and take the necessary precautions with proper socialization. Ending2: [substeps] Gradually introduce the puppy to new people and strangers gradually over several weeks or months so it associates a new routine with that new environment. Introduce a new dog gradually during the first few weeks of life. Ending3: Remember to make sure its vaccinations are active before bringing your puppy around other dogs. [substeps] Bring your puppy to your veterinarian before you introduce it to other people and animals outside of your home. Ending4: [substeps] Adopted dogs tend to bond well with their parents. This means that it is important to start socializing your new dog early so it associates the new presence with fun.

Answer format: ending1/ending2/ending3/ending4