Start a Labrador introduction with scent, not sight
A Labrador Retriever should learn a resident pet's smell well before the two animals share a room. Rub a soft cloth gently along the resident pet's cheeks and bedding, then let the Labrador sniff that cloth in a different room while you reward calm interest. Do the exchange in reverse, giving the resident pet a cloth carrying the Labrador's scent near a meal or a favorite resting place. Labradors investigate the world nose first, so this quiet exchange teaches both animals that the new smell predicts good things rather than a sudden intruder appearing in the hallway.
Tire out the bounce before the first shared walk
A Labrador Retriever who has not exercised will greet a resident pet with spinning, pawing, and a tail that sweeps objects off low tables. Walk the Labrador first, add a short retrieve session away from the resident pet, and allow time for panting and arousal to settle before any meeting begins. The goal is not exhaustion. A pleasantly tired Labrador can still notice the other animal, but the frantic edge that turns curiosity into chasing is much reduced.
Once scent work looks relaxed on both sides of a door, take the dogs, if the resident pet is a dog, on a parallel walk in a neutral place such as a quiet street neither animal claims. Walk in the same direction with generous space between handlers, letting the Labrador glance across and then return attention to you for praise. Close the distance gradually over several outings only when both dogs keep loose, wiggly bodies and can disengage from each other easily. If the resident pet is a cat or a small mammal, skip the walk entirely and stay with door and gate stages for longer.
Use a gate so the resident pet keeps an escape route
A sturdy baby gate or a cracked door secured with a latch lets a Labrador Retriever and a resident pet see each other without the Labrador being able to rush in for a full-body hello. Feed both animals on their own sides of the barrier, far enough back that each can eat without staring at the other between bites. Short sessions that end while everyone is still relaxed teach more than one long session that drifts into frustration at the barrier.
Read the Labrador's play style before letting them loose together
Labrador play is physical, mouthy, and full of body slams that another Labrador may love and a delicate resident pet may hate. Watch the first off-leash moments in a large, uncluttered area with exits the resident pet can use without being cornered. Look for role swapping, pauses, and both animals choosing to re-engage after a break. One-sided chasing, the Labrador repeatedly looming over a pinned or fleeing animal, or play that keeps escalating without pauses means you should separate them calmly and return to gate work.
Settle the new routine household-wide
Progress is measured in the resident pet's behavior, not the Labrador's enthusiasm, because the Labrador would usually declare them friends on day one. When the resident eats normally, rests in the open, and moves around the home without detouring around the Labrador's area, the household is genuinely settling. Keeping those feeding turns, gate sessions, and rest breaks organized is easier when KinsLe Care Teams assigns each introduction job for the Labrador to a specific person and records when that job was completed.