Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to introduce a new pet rat to another rat [title] When you bring your new rat home, don't have it in the same room as your other rat until you're sure it won't pass on any diseases. [step] Wash your hands between handling your rats. Some people choose to quarantine new rats from the others for several weeks.

Ending1: It is optional, but if you don't want to rat your new rat, it is ok to leave it in the same room. [title] Make sure you get along with the rats. Ending2: [title] In the same room as your other rat, introduce it to its territory. [step] This will give your rat a chance to explore where it wants to go without its home being disturbed. Ending3: [title] When you're ready, place the new rat's cage in the same room as your other rat's cage, but about three feet away. [step] This should get them curious about each other and used to seeing and smelling each other. Ending4: In that case, the new rat might let you handle it without it. [title] Wait on the arrival of a new rat.

Answer format: ending1/ending2/ending3/ending4