Meet through the run wire before meeting in the open
A Plymouth Rock chicken should first meet a resident pet with the chicken inside its run and the pet outside the wire, free to watch but unable to reach the bird. Put the hen's food and water near her coop end so she can choose her distance, and settle the pet far enough away that it can still respond to its handler. End the session while both animals are relaxed, even if that is only a few minutes on the first day. Repetition at this easy level is what turns a novelty bird into background scenery for the resident pet.
The Plymouth Rock temperament helps, but does not protect her
Plymouth Rocks are among the calmest laying breeds, steady, curious, and less prone to panic than flightier hens, which makes introductions smoother. That steadiness has a catch: a confident hen may walk right up to the wire, peck near a dog's nose, and startle it into a snap. Watch the chicken's behaviour as carefully as the pet's. A hen who keeps scratching, dust-bathing, and feeding near the wire is relaxed. One who retreats to the coop and stays there is asking for the sessions to be shorter and the pet further away.
Training the resident pet during each session
Use the meetings as short training opportunities rather than passive tests. Ask the dog for a sit or a settle on a mat, reward check-ins with you, and quietly move further away the moment it fixates, barks, or digs at the run. A cat should be free to leave at any point, with the chicken's pen secured so there is no way in. Resident pets that already know the farm's other birds are not automatically safe with a new hen, because a single unfamiliar bird can restart chasing. Treat this introduction as its own process regardless of past good behaviour.
First shared space, on the chicken's terms
After a run of calm meetings through the wire, let the pair share a larger area with the pet on a long lead, the hen free to range, and at least two escape routes back to cover for the bird. Morning sessions, when the hen is busy foraging and the pet has already been exercised, tend to go best. Keep people between the animals at first, scatter feed for the hen away from the pet's position, and finish before either animal tires. Keep separating them outside supervised time until calm coexistence has been the pattern for weeks, not days.
Who watches, and how the household keeps it straight
The weak point in most chicken introductions is a gate left open or a dog let out by someone who did not know the hen was ranging. Agree a simple rule everyone follows: doors to the run stay latched, the dog stays on a lead in the yard during the introduction period, and sessions happen only with a designated watcher. Tracking those supervised sessions in KinsLe through Care Teams, where each meeting is assigned and signed off with a timestamp once done, keeps this Plymouth Rock's safety from depending on memory or crossed wires at home.