For your pets to live in harmony......together.......they need a bonded partner of the same species
We DO NOT mix Rabbits with Guinea Pigs neither do we recommend or consider rehome for them as this can & prove disastrous and worse fatal.
Species versus size:
Rabbits are of course more powerful and a danger to a small guinea pig especially if space is limited.
We all know a rabbit can express their emotions & personality by kicking or stomping their hind legs and feet but even a happy rabbit will 'binky' creating a wave of jumps and spins and in the path of a small guinea pig will can to result in diaster.
Pasteurella multocida and Bordetella bronchiseptica are infections contracted by rabbits. If an associated bacterial infection is contracted by a guinea pig this can cause respiratory disease and fatal if not treated.
Once acclimatised all rabbits can quite happily live year round outside. Guinea pigs however are susceptible to extreme temperatures of both <high/low> also situated in a draft or windy site or an area and they can die if they are not kept indoors during climatic months and this could be for winter <october/april>.
Rabbits & Guinea pigs are both herbivores who eat mostly hay & straw but they need different nutrients.
Guinea pigs require Vitamin C on a regular basis unlike rabbits who are anatomicably able to make up their own vitamin C without human intervention. Guinea pigs requir this from eating fruit and vegetables and through specially-formulated pellets or a good staple dry mix diet with added Vitamin C. Guinea pigs should have unlimited access to hay, straw, pellets, dry mix diet and daily fresh fruit and vegetables.
Rabbits require 90-95% of their diet to be mainly haw and some nice golden barley straw and their pellets or dry mix diet should be minimal in their diet.
Offering rabbits as opposed to guinea pigs the correct staple fresh fruit and vegetables can be challenging as their needs again are quite apart as aside likes and dislikes there are some vegetables which are poisonous to some as are garden plants, weeds.
Petting & grooming:
For rabbits this is a normal social activity but this is not something to be witnessed or encouraged for rabbits and guinea pigs as a rabbit can bite a guinea pig in the process. A friendly rabbit without realisation may over'pet' a small guinea pig and literally lick them until what little hair may remain and this may cause stress and trauma to a guinea pig as well as other non specific symptoms such as skin or fungal conditions.