The greatest threat is attract by predators. These occur primarily at night, but can also happen occasionally in the daytime. Hutches or cages do not provide enough protection to make it safe to leave the rabbit outdoors 24 hours a day. With her acute vision, hearing, and smell, a rabbit can sense the presence of a prdator such as a cat even in your neighbor's yard. She my panic and injure herself, or she may die of shock. If your bunny cannot stay in your house at night, make sure that he's enclosed within solid walls and behind a solid door, a garage, shed, or basement with a good lock.