You will want it to also have room for a litter box with litter, her food and water dishes, and a box for her to rest in, so aim for at least twice that amount of floor space in the cage.
You can also use a piece of fleece fabric, because it won’t leave long strings in the digestive tract if the rabbit eats it. You can also put newspaper under the cage, just don’t use newspaper as bedding. [1] X Research source Keep in mind that you will also need to place a layer of bedding over the floor to provide cushioning for the bunny.
Make sure to give her enough so she can shape it, move it, and burrow in it how she wants. Check the bedding daily and clean as necessary. Your rabbit shouldn’t be going to the bathroom in the bedding, so if this occurs, you need to give the rabbit a larger area to roam, exercise, and move around. Unclean bedding can lead to fleas, flies, and other pests. Don’t use straw, cardboard, newspaper, wood shavings, sawdust, cat litter, or cedar or pine products as bedding. It can harm your rabbit.
If you want to keep your rabbit inside, but have limited space for her to play, you can set up an outdoor cage for her to run around and play. Outdoor hutches are easier to clean and give the rabbit more room to play and run around. If you play your hutch outside, make sure to keep it away from direct sunlight, drafts, damp areas, humidity, extreme temperatures, or loud noises. The hutch should have a roof to protect her from the rain. Make sure the hutch is protected from predators, including dogs and cats.
Make a kitchen end and a bathroom end of the box. The bathroom end will be where they do their business, while the kitchen end will be where they will nibble clean hay. If you have multiple bunnies, get a very large litter box or individual boxes for each bunny. Change your bunny’s hay often to keep it clean. Bunny’s will use a clean litter box, but avoid a dirty one. Don’t go 2 days without changing the litter box. To clean, just dump everything into the trash, add more bunny-safe bedding, and wash the box. You should confine him to this cage until he is consistently using the litter box.
Watch your bunny carefully when she is running around the room and give her an acceptable chewing object if she tries to go after furniture or part of the house.
If you let your rabbit run around in a room, make sure there is plenty water available for her.
Grass hay is better for a rabbit than alfalfa hay, which is too high in protein and calcium to be fed as anything other than as a treat.
An adult Holland Lop rabbit can have ⅛ to ¼ cup of pellets daily. Make sure to change the pellets daily so your rabbit can have fresh pellets.
Never ignore these signs. If you see them, contact your veterinarian immediately for an examination.