A Devon Rex usually wants housemates, not solitude
A Devon Rex can live happily with other pets, and many actively prefer it. The breed is famously people- and animal-oriented: Devon Rex cats follow their households around, join games they were not invited to, and seek out the warmest available lap, which is often a tolerant dog. A single Devon left alone for long stretches is more likely to be understimulated than one sharing the home with a companion animal. That sociability is the starting point, but happiness depends on matching the Devon's energy to the right housemates and introducing them properly. A shy, elderly resident cat or a dog with a strong chase instinct changes the calculation entirely, even though the Devon side of the pairing is willing.
Dogs and other cats: the pairings that work best
With dogs, a Devon Rex does best with a cat-savvy, moderately calm dog whose prey drive is low and whose greeting style is not a full-body pounce. The Devon's slight build and fine bones mean rough play that a sturdier cat shrugs off can genuinely hurt, so supervised early meetings should watch the dog's intensity, not just the cat's reaction. With other cats, an equally playful companion is the sweet spot: a Devon will invite a reserved cat to wrestle at hours the other cat would rather sleep, which breeds friction that looks like incompatibility but is really mismatched tempo. Give the resident cat vertical escapes and closed-door retreat options, and let the Devon burn energy in scheduled play sessions with you so housemates are not the only outlet.
Birds, rodents, and fish need real barriers, not trust
Small prey animals are where a Devon Rex household needs engineering rather than optimism. A birdcage on a stand, a hamster enclosure with a lightweight lid, or an open-top fish tank all sit within reach of a determined, athletic cat with famously dexterous paws. Keep small mammals and birds in a room the Devon cannot enter unsupervised, with latched doors and enclosures secured against tipping and lid-lifting. Fish tanks need fitted, weighted lids, and cables and filters should be arranged so a cat sitting on top, drawn by the warmth and movement, cannot dislodge anything into the water. No amount of apparent friendship between the Devon and a smaller animal removes the grab reflex that movement triggers, so the barrier, not the relationship, is the safety plan.
Introductions that let a Devon Rex settle in
Introduce a Devon Rex the slow way even though the breed's friendliness tempts shortcuts. Start with a closed door: the Devon on one side, resident animals on the other, feeding both near the door so each associates the other's scent with good things. Swap bedding after a couple of days, then allow visual contact through a gate or cracked door before any free meeting. Watch for the Devon's stress tells, which in this breed often look like going quiet, hiding in high spots, or over-grooming the thin coat, rather than dramatic hissing. Keep meetings short, end them before tension, and keep litter boxes, bowls, and resting spots duplicated until sharing is genuinely relaxed. When the whole household can see each pet's routine, feeding notes, and introduction stage in KinsLe through Family Sharing, every family member follows the same plan instead of improvising their own version.