I spend most of my time in my room, and before I was only letting the rats out for about an hour a day because I would have to lock the rabbit out of the room, then he couldn't get to his litter or water and it was annoying. So, I decided to introduced the rabbits and rats. I had done research for about a year now on it, and my animals live in close proximity so they're really used to each other and humans. It went great. Now, I have all five of them out all night. The rats made a little nest on top of The rabbits cage. The rabbit can hop in the rat cage to get their fleece blankets. And play with their toys. The rabbit even curls up with the one rat at night. They all groom each other. I'm really glad I have such amazingly loving animals that can cohabit so well!