Points to Consider:-
1. Hedgehogs do not need or crave companions, they are happier having their own living space.
2. It IS possible to have hedgehogs cohabit successfully, but then you can have the problem of the hedgehogs bonding and becoming depresses or lonely if one dies.
3. It is harder to keep track of how much they are both eating and drinking.
4. It is harder to pinpoint the problem if one were to have a health problem because you are looking at the actions of multiple animals and not just one.
If you are determined to keep hedgehogs together despite the concerns above, please consider the requirements below:-
Most common pairings are female-female. Females are more likely to get along than males, males will rarely tolerate each other. It is also possible to keep a male-female pair but one must be spayed or neutered. It is NOT acceptable to have an opposite sex pair where both are unaltered. The female will constantly be pursued by the male, become pregnant, birth the babies, and then most likely cannibalize the litter due to stress. This can also lead to increased probability of reproductive problems and the risk to her life each time she gets pregnant.
There is not much benefit of housing hedgehogs together space or supplies wise. You will need an even larger home for them, two sleeping places, two wheels, two water bowls, two food dishes etc. If they are forced to share the same supplies there is more chance of them fighting due to competition for the food and wheel.
You will need a second home on hand in case you need to separate them. There are no guarantees that two hedgehogs will get along, even if raised together from birth. If there is bloodshed, separate them.
All in all, it is best to keep hedgehogs by themselves.