How do u catch a rabbit that got lost in a big house
Keep all doors and windows closed. You should look into every corner and every place it could have hidden. If you have an idea what room he may be in, put his cage on the floor in that room. Before the cage, put some foil and leave a treat (rabbit's fav food) on it. Now wait and listen carefully until your rabbit shows up. You can put foil+food in every room in fact. Don't worry if you've kept the doors and windows closed you should find him eventually because rabbits want to eat too!