Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to choose between a shelter or a breeder dog [title] Decide if you want a puppy or an adult dog. [step] One of the big differences between shelter and breeders is the age of the dog when you take him home. While shelters do have puppies, born to pregnant dogs that were abandoned, by far the majority of the dogs they have are adults.

Ending1: However, the reverse is true for breeders. They are in the business of selling puppies, and their adult dogs are rarely for sale as they are either pets or breeding stock. Ending2: Only 18 is a given for most shelters. [substeps] If you choose an adult dog, knowing your puppy's age is your primary concern. Ending3: Getting an adult dog is a mind game. When you get a dog from your shelter or a breeder, he or she will probably be more comfortable by allowing you to adopt a puppy. Ending4: Be sure to read the breed code to be sure if you want a shelter dog and an adult dog in general. You can also find breed codes where they list the age and breeding of a dog.

Answer format: ending1/ending2/ending3/ending4