Yes for a Californian, with supervision as the permanent rule
A Californian rabbit can live happily in a home with other kinds of pets, and its size and generally calm temperament work in its favour. A Californian is a large breed, so it is less fragile-feeling to live alongside than a tiny dwarf rabbit, and many individuals are confident enough to hold their ground politely. Happiness, though, depends on management rather than temperament alone: the rabbit needs its own territory that dogs and cats cannot enter, and every shared moment stays supervised for the whole of the rabbit's life. A Californian that can retreat, graze, and rest unobserved-by-predators is a rabbit that can genuinely relax in a mixed home.
Dogs and cats read a rabbit differently than you do
A dog or cat sharing a home with a Californian rabbit still carries hunting instincts that a rabbit's sudden dash can switch on in a second. Even a friendly dog can injure a rabbit in overexcited play, and a cat's casual swipe carries claws a rabbit's skin tears under easily. That is why first meetings happen with the Californian inside a sturdy exercise pen or behind a gate: the other pet learns the rabbit's smell and movement while the rabbit learns it can hop away unmolested. Watch the dog's body language across several sessions; hard staring, trembling excitement, or lunging at the pen means free contact is not on the table, possibly ever, and that is a workable answer too.
Another rabbit is the companion a Californian understands best
The company a Californian rabbit usually thrives on most is another rabbit's. A neutered pair, introduced gradually on neutral ground, can groom, flop, and feed side by side in a way no dog or cat can offer, because rabbits are social with their own kind in a way they are not with predators. Bonding takes patience: side-by-side pens, swapped bedding, and short supervised meetings that end before tension builds. A Californian bonded to a companion often becomes calmer around the household's other animals as well, since it is no longer the only prey animal watching the room. If a second rabbit is impossible, extra human time and a rich pen setup matter even more.
Setting up the shared home so the rabbit stays the calm one
A Californian rabbit sharing a home needs a home base that other pets cannot reach: a pen or rabbit-proofed room with a hide house, hay, water, and a litter tray, closed off whenever nobody is present. Litter trays and hay racks should sit where a dog cannot scavenge them, and the rabbit's pellets should be stored out of reach of every animal, since rich foods upset different species differently. Give the Californian daily out-of-pen time in a room the other pets have vacated, at least at first, so exercise never doubles as exposure. Over months, some households earn relaxed shared floor time; the rabbit's willingness, shown by grazing and flopping near the others, is the signal to trust.
Signs the mix is stressing your Californian
A Californian rabbit that thumps repeatedly when another pet passes, stops eating, hides all day, or lunges and grunts at the pen bars is telling you the arrangement feels unsafe to it. Appetite loss in a rabbit is never trivial: a Californian that skips hay for a day needs the stressor removed and, if eating does not resume promptly, a vet visit. Separate the animals fully, rebuild distance, and let the rabbit's behaviour set the pace of any retry. KinsLe's Family Sharing keeps your Californian's safe-room rules, feeding notes, and supervision boundaries on one shared profile, so every family member protects the same calm you have built.