| tricky. They can become very territorial, especially in the case of two bucks (males), which should never be housed together, or a pregnant doe (female).
You'll find it is easiest to introduce a new rabbit to your den if your current rabbits are:
a buck and a doe pair, and you are introducing a doe.
You will minimize stress if you make the introductions in a neutral environment, away from your current rabbit's usual living space. A new
cage, for instance, or a room where your existing rabbit usually is not allowed, are both good options for introductions. Limit the introduction to a short duration, and watch for aggressive body posturing that can signal an impending fight. If they look as though they intend to fight, separate them before trouble occurs and try again the next day.
treats in different corners of the new area and allow your rabbits to busy themselves with the positive experience of gathering and eating those treats. Introductions are best done over several weeks, with at least one short meeting between the rabbits each day. Once they are well acquainted, rabbits are usually very happy to have another den mate.