Why separation, not friendship, is the safe goal
Plenty of cats and dogs live in homes with birds without incident, but that record is built on separation and supervision, not on the animals learning to be friends. A cat's hunting sequence is triggered by fluttering movement, and it can fire in a fraction of a second even in a cat that has ignored the bird for years. A dog that would never chase a bird outdoors may still mouth at one that lands near its bed, and the size difference alone makes any contact dangerous. Added to the physical risk, bacteria normally present in cat saliva and on cat claws can cause a serious infection in a bird from a scratch so small the owner never sees it. The plan below assumes your cat or dog is a normal predator living alongside prey, and it protects the bird even on the day an instinct wins.
The cage as a secure base
Choose a cage with bar spacing narrow enough that a cat's paw cannot reach through, and check that every door, including small feeder doors, latches firmly or can be clipped shut, because cats learn to lift simple slides. Place the cage on a stand or wall bracket so it cannot be rocked or pulled down by a dog bumping into it, and position it away from shelves or furniture a cat could use as a launch pad onto the cage top. Keep the cage in a room that can be closed off completely, and make that door the boundary whenever nobody is present.
Supervised time together, on strict terms
If you choose to have the animals in the same room, do it deliberately rather than by accident. The bird stays in its latched cage while the cat or dog settles, so you can read the mammal's body language first: fixed staring, crouching, chattering, whining or trembling all mean the session ends and the animals are separated again. A relaxed dog that glances away and settles, or a cat that chooses a distant spot and grooms, is showing you the calmest version you will get, and the bird still stays caged. Out-of-cage time for the bird happens with the cat or dog shut in another room behind a closed door, every time, not just when the mammal seems interested. Never hold the bird near the cat or dog for introductions, never let a dog lick or nose the bird, and never leave the room to answer the door mid-session; put the bird back first.
Routines for the whole household
Mixed-pet homes fail at handover points: a child lets the dog into the bird room, a partner leaves the cage unlatched after feeding, or a house guest opens a door out of habit. Agree one written sequence for feeding, cleaning and free-flight time, and keep it identical for every person. Free flight happens at a set time with a closed-door check called out loud. Cleaning the cage happens with the cat or dog elsewhere, because an open cage door plus a distracted owner is the classic accident setup.
If contact does happen
Treat any tooth or claw contact, however minor it looks, as urgent. Move the bird to a warm, quiet cage, note the time and what happened, and contact an avian veterinarian the same day even if the bird seems bright, because infections from cat contact can develop quickly and early advice gives the best chance. Afterwards, review how the barrier failed and change the physical setup, not just the intention to be careful. A home where barriers do the work, and people simply follow them, is one where a bird, a cat and a dog can genuinely share an address in safety. Recording those barriers and free-flight times on the shared profile in KinsLe Family Sharing helps every family member hold the same line, including on days when someone new is feeding or cleaning.