Start with what your older dog cannot afford to lose
An older dog experiences a new puppy less as a playmate arriving and more as their settled world being rearranged. Before the puppy comes home, list the anchors of your older dog's day: where they sleep undisturbed, where they eat without competition, their walk times, any medication or joint-care routine, and their quiet time with you. Those anchors stay fixed after the puppy arrives. Feed the dogs apart from day one, give the puppy their own bedding and toys rather than handing over the older dog's favourites, and keep the older dog's resting place a puppy-free zone the puppy is never allowed to invade, however cute the attempt looks.
Arrange a first meeting that asks very little
Introduce the dogs somewhere neutral, such as a quiet street or a friend's garden, rather than in the hallway where your older dog's territory and excitement collide. Walk them in parallel at a distance where the older dog notices the puppy but can still look away, take treats, and walk loosely. Shorten the distance only as both stay relaxed, and keep this first meeting brief — a few minutes of calm coexistence teaches more than a long, intense introduction. If your older dog stiffens, stares hard, or cannot settle at any distance, do not push on to a home meeting that day; get advice from a qualified trainer on a slower plan.
Build a home the older dog can escape within
Puppies pester. They climb on sleeping dogs, steal chews, and keep pestering long past the point an older dog has signalled enough. Baby gates, a puppy pen, and doors used deliberately mean the older dog can always leave, which prevents the trapped, escalating confrontations that damage the relationship. Expect the older dog to grumble, show teeth, or give a short air-snap when a puppy ignores polite warnings — that is normal canine teaching, provided the puppy can retreat and the older dog settles immediately afterwards. Step in yourself when the puppy keeps returning after a warning, so your older dog never has to escalate to be heard.
Keep the older dog's privileges visibly intact
Greet your older dog first sometimes, keep their solo walk or their evening spot beside you, and train the puppy separately so the older dog is not constantly displaced by the newcomer needing attention. Shared activities build the new bond at the older dog's pace: parallel walks, calm time in the same room with chews, and training games where both earn rewards for settling. Many older dogs warm to a puppy over weeks as the puppy's manners improve and the novelty wears off, so do not judge the relationship by the first few days or force cuddling and play for the sake of a photograph.
Watch for the older dog quietly losing out
The warning sign in these households is rarely a fight; it is the older dog eating less eagerly, avoiding rooms the puppy occupies, sleeping in odd corners, or going flat and withdrawn. Those changes deserve a vet check as well as a management rethink, because pain and stiffness make an older dog far less tolerant of a bouncy puppy, and treating the discomfort can transform the introductions. Keeping two dogs' needs straight in one household gets easier when KinsLe Family Sharing puts the older dog's routines and the puppy's care information in front of everyone helping, so the senior's walk, rest, and feeding arrangements are never guessed at or forgotten.