Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to introduce a new cat to other cats [title] Begin with a confinement period. [step] Never allow two cats to interact face to face right away. Cats are territorial by nature.

Ending1: You can't get a cat to rest in the same cage if they're both fighting or in separate cages at the same time. Wait until both cats are in separate cages for at least one week before introducing a new cat. Ending2: They will often get of finding other cats in unfamiliar places and hiding. To help minimize this issue, start placing your new cat in a new crate for 12 hours at a time. Ending3: Try to get them to associate sitting or lying in a quiet location with their new pet. Likewise, they do not want to come into contact with each other. Ending4: Your current cat will not react well if you simply introduce a new cat into its territory. Begin the introduction process with a period of confinement.

Answer format: ending1/ending2/ending3/ending4