Why this change is big for your dog
A lodger's children alter your dog's home in every sense at once: new smells, higher and faster voices, unpredictable movement, toys and food at floor level, and strangers who are suddenly present at breakfast and bedtime. A dog who coped beautifully with visiting children for an afternoon may still struggle with children who never leave, because the performance never ends. Expect an adjustment period measured in weeks, and plan it like any other introduction between animals: gradually, with escape routes, and with the dog's known safe places protected. Your goal is not instant friendship. It is a dog who understands the new pattern and children who understand the dog.
Prepare before the children move in
Let your dog investigate the children's scent on clothing or a blanket before faces are involved, rewarding calm sniffing so the smell arrives with good associations. Set up the geography in advance: your dog's bed and feeding station move, if necessary, to a spot the children will be taught is out of bounds, and a baby gate or closed door guarantees a retreat the dog can reach at all times. Agree the house rules with the lodger before day one, while everything is hypothetical and calm: no approaching the dog while he eats or sleeps, no hugging or climbing on him, and an adult always present for interactions until everyone has earned confidence.
Run the first meetings carefully
First meetings go best on neutral, unhurried ground: a garden or a walk together, with the dog on a loose lead and free to close distance or keep it. Ask the children to be statues with treats: standing sideways, letting the dog sniff, then dropping a treat near their feet rather than reaching over his head. Keep these sessions short and end them while everyone is still relaxed, then give the dog his retreat and praise. Repeat daily in ordinary settings, letting the dog watch the children play from a distance he chooses. Most dogs warm up quickly once the pattern proves predictable, and forced cuddles only ever teach the opposite lesson.
Teach the children as much as the dog
Children old enough to live in the house are old enough to learn dog language in simple terms: a dog who walks away is saying no, a still and staring dog needs an adult, and a sleeping dog is never to be woken for a game. Give the children jobs that build the right relationship, such as scattering the dog's treats in the grass for a finding game or holding the spare lead on walks while an adult holds the real one. At the same time, train and reward your dog for the behaviours the household needs: settling on his bed while the children eat, ignoring dropped food, and coming to you when the play gets loud.
Watch the adjustment honestly
Progress looks like a dog who chooses to rest in the same room as the children, greets them with a loose wag, and recovers quickly from surprises like a dropped toy or a toddler's shout. Warning signs deserve prompt action rather than hope: growling, guarding toys or people, hiding for long stretches, appetite changes, or snapping at air near a child. Separate the dog kindly, give everyone space, and ask your vet or a qualified behaviourist for guidance before the pattern sets. Most households find the rhythm within a month or two when the ground rules hold. KinsLe's Family Sharing shares your dog's boundaries, feeding routine, and retreat rules with everyone under the roof, so the lodger and older children work from the same instructions you do.