Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to introduce a dog and a rabbit [title] Research rabbit-friendly dogs. [step] If you bring a new dog into the family, make sure it is a rabbit-friendly one. You may want to avoid retrievers, labradors and terriers, which are predisposed to hunting and tracking down animals such as rats and rabbits.

Ending1: These breeds are known for their hunting instincts. [substeps] A dog's breed may not completely signify a dog's personality. Ending2: However, if you take a wild rabbit out for walks with your new dog, find one that has plenty of space to roam. There is no need to spend so much time and effort just exploring the castle. Ending3: [title] Feed your new pet rabbits as a companion for your family. [step] Use rabbit-friendly treats or snacks to feed your new animal. Ending4: [substeps] However, if you are introducing a stray rabbit, ensure that the rabbit is relatively new to the family. If you are bringing a new dog into the family, make sure that the owner shows it off to the dog first.

Answer format: ending1/ending2/ending3/ending4