To guineagurl
Why not keep the pigs and rabbits in seperate cages all the time but allow them playtime together? That way you can supervise and seperate them immediately if something goes wrong. I would stop the guinea pig immediately if he starts humping the rabbit; it may seem funny, but quite a few rabbit fights start with humping and then escalate to kicking and biting. A guinea pig does not have much chance if the rabbit becomes annoyed and decides to take it out on the guinea pig.
Why are you keeping the rabbits outside? Rabbits are very social animals and thrive on attention. The average lifespan of an outdoor rabbit is only 2 years, but when spayed/neutered and kept in the house rabbits can easily reach 10 years and beyond. The reason for the huge difference is all the risks that outdoor rabbits are exposed to. Rabbits can die from just sensing a predator and foxes can pry open a rabbit hutch. Raccoons can literally pull a rabbit apart by reaching inside the hutch.
Outdoor rabbits are exposed to all weather conditions including the heat of the summer and the cold of the winter, and thunder storms (which can give them a heart attack). You are less likely to notice any illness or injury when you spend only minimal amounts of time with them. Any outdoor animal is likely to be neglected at one time or another; out of sight, out of mind. It is inconvenient to go out in the middle of a thunderstorm, snow storm, or when it is extremely hot or cold to care for your pets.
Rabbits need about 3-4 hours of exercise a day to keep them healthy and happy, most outdoor rabbits are stuck out in a hutch 24/7 with minimal to no exercise.
Outdoor rabbits with minimal exposure to humans will most likely become timid, protective, aggressive, and may bite.
How will you enjoy your rabbits when they are stuck outside? Rabbits can make fun, endearing, and entertaining pets. They run, jump, play with toys, most like to be petted, and some even enjoy suddling on the couch with their favorite person.
You can visit
www.rabbit.org for more info on rabbits.