They should be kept singly. All small children should be supervised while handling small animals, for the safety of the child and of the animal. These animals are all available on a regular basis and are easy to care for. Normally, rabbits are solitary animals that would not get along together. For breeding, only put breeders together for short supervised periods of time.
Rabbits can do some damage to each other if they want the other out of their territory.
Occasionally 2 rabbits will live their entire lives in a cage together, but this is nor normally the case. A rabbit doesn t require shots or regular visits to the vet. Watch his teeth and nails to see if they need clipping. If they do, a quality pet store or vet can take care of the clipping at a very reasonable price. If you notice a change in the rabbit s stool or actions, have it checked by a vet as soon possible.