Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to care for sussex rabbits [title] Plan to keep your sussex rabbit indoors. [step] Keeping your sussex rabbit outside will put her at risk of premature death and loneliness. Sussex rabbits require human companionship to thrive.

Ending1: If you plan to keep them out in the open, you will need a fenced-in area where they can run and hide. [substeps] You will also need enough room in the rabbit's cage to get them accustomed to long-term housing. Ending2: They are also prone to overheating, hypothermia, and attacks by predators. [substeps] Even if you are certain that your sussex rabbit is safe in her cage, rabbits are known to have heart attacks from fear. Ending3: How long can you keep them indoors to care for her? In some cases, your sussex rabbit may be found with her hutch shut up, but in other instances, you'll need to provide plenty of milk and shelter. [substeps] Sussex rabbits require more care than other wildlife shelters. Ending4: If you want to spend a lot of time with her, you'll need a ferret to entertain you and reduce your anxiety. Just like other animals, sussex rabbits live at a very low temperature, so they will survive without constant stimulation.

Answer format: ending1/ending2/ending3/ending4