Hedgehogs need to be housed separately as they are solitary animals. This means they choose and prefer to live alone. If left together they may cause each other harm. Like a slow battle to the death.. Because of their built in armor the battle is long, you may not even notice any harm is being done until it's to late.!
Note: Hedgehogs of different genders should not be left in with their litter mates or their mother past 7 weeks of age to avoid the chance of inbreeding!.
If I got to choose housing for each hedgehog I placed it would be: A 30 inch Super Pet cage, My First Home "large".
This cage provides enough room for a igloo, litter pan, food, water and most important, the hedgehog! Wire on the top provides a well ventilated living space. The plastic bottom wraps up the sides of the bottom of the cage so not only does it keep mess off the floor, it is also a easy to clean and sanitize surface. Hedgehogs do best off a wire bottomed cages, with a low placed water bottle, a dark and or private place to sleep, clean cage and full n' clean food n' water...
Hedgehogs will climb the horizontal bars. I have never had a hedgehog get hurt doing this and most grow out of wanting to climb the wire at all. Because they climb they then have to fall and like I said, I have never had one get hurt but if you feel your hedgehog is overly hyper as some are and they are doing this often I would get a cage that has vertical bars, put up something to cover the bars or put them in something else for a while. The choice is yours.
You will need to watch model numbers and dimensions on igloos and litter pans because different sites will call the very same igloo or litter pan a different size.
A medium sometimes called small Super Pet igloo will need to be (12"L x 10.5"W x 6.25"H),
A large Super Pet "ferret" high corner litter pan will need to be (13.75"L x 10"W x 6.5"H),
>4 inch ceramic food dish, (found in cat or dog items)
>>A 8oz to 16oz clear water bottle. I need to add, you must make sure the ball inside the water bottle spout does not get stuck!!!. You can do this by tapping the end of it to make sure water is coming out. Also in case of hard water, you can soak the water bottle spouts in vinegar for 15 minutes or so to remove any build up every month or so- just make sure you rinse them really good or it will taste bad.! I started using Culligun water to avoid the whole issue but I still soak the spouts every couple months.
I use pine shavings for bedding (remember NEVER use cedar on caged critters)
Recently I started using wood pellets for litter. It was kind of a happy accident.
I wasn't always able to find the litter I liked but could usually find the generic one but then that started to not be reliable either. I have always used wood stove pellets for my cats so I gave it a shot and was more than pleasantly surprised. I have found the pellets to be the cheapest and the most effective thing I have ever used. I would highly recommend these to EVERYONE!!!