Rabbits can go into severe grief afterthe loss of a bonded mate . Some rabbits actually die from this, however , a person who is on top of it can help the rabbit through the grieving process by possibly giving the rabbit a stuffed rabbit withthe scent of the deceased rabbit on it; the owner also need to pay even more attention to the remaining bunny than usual
Ifa person has other single rabbits it often helps to place the rabbit in the same room as the single rabbit but not actually together in the same cage or x-pen.
The grieving rabbit can at least smell and hear the other rabbits in the room.
When one of a bonded pair pass on the body should be shown to the remaining rabbit so he/she will not be looking for his partner and not know what happened.
In time you can attempt to get another rabbit to bond with the widow/widower although it is best to allow the rabbit to initally choose his own companion (this is allowed at House Rabbit society adoptions and some shelters)
I have had 2 rabbits pass from2 bonded pair. In both cases my rabbits survived well although I doubt that life is as happy as it used to be with their partner.
One rabbit would love a mate but has so far refused any of the other single rabbits thatI have here. The bond was specific in that the remaining bunny is very dominant and the deceased rabbit was as passive as they come which was a perfect match and something that I have not been able to replace.
I have anotherwidower who lives next door to a female rabbit and has a crush on her.I cannot allow them together because of some aggressive issues with the female and also because of specific feding issues with him.
They do alright sort of being friends next to each other.
There are many articles on this subject andI will try to find a few to help you to prepare for something that we hope will not occur for a long time