The dock is where the enemy lives
To you, the charging dock is furniture. To your dog, it is the vacuum cleaner's den — the place the noisy machine sleeps, the spot it always returns to, and the point from which every noisy patrol begins. Dogs are superb at learning locations that predict events: the cupboard with the clippers, the drawer with the lead, the hook with the muzzle. Barking at the dock is often barking at the promise of the vacuum rather than at anything the dock is doing right now. The concentration of the machine's smell in that one corner strengthens the association; dust, warm plastic and carpet odour cling to a parked vacuum, and a dog's nose reads that corner as thoroughly vacuum territory even in total silence.
Small signals you may not notice
A dock is rarely as inert as it looks. Many have a standby light that glows or pulses, and a dog who has paired that light with the machine waking up may react to the blink alone. Charging electronics can produce faint clicks, ticks as plastic warms and cools, or a hum at a pitch people barely register but dogs hear easily. The vacuum itself may shift slightly in its cradle when bumped by a skirting board draught or a closing door, giving a tiny movement in the corner of the dog's eye. None of these need to be loud; they only need to be the first frame of a film your dog knows by heart.
Shrinking the dock's importance
Start by changing the geography. Move your dog's bed, bowls and resting spots so he is not expected to relax within sight of the dock, and if the dock can live in a cupboard or utility room without inconvenience, relocating it removes the daily confrontation entirely. Where it stays, rebuild the corner's meaning: scatter treats in the grass of that area — on the floor near the dock while the vacuum is parked and still — during calm moments, and let him choose to wander over, eat and leave. Play his ordinary games in that part of the room. The aim is a corner where good, dull things happen far more often than vacuum launches.
Separate the dock problem from the vacuum problem
If he also barks at the vacuum in action, work on the two triggers separately, because the moving, roaring machine is a much bigger ask than its parked dock. Dock practice happens with everything off and still. Vacuum practice happens later, in short sessions, ideally with the machine starting in another room so the sound arrives gradually, and with him free to leave rather than cornered. Do not roll the vacuum out to 'show him it is fine' right after a dock session — that pairing teaches him the dock treats were a trap and the monster did follow. Progress on the dock alone is a real win: a dog who can rest near the parked machine has lost half the battle.
A corner everyone treats the same way
Dock work fails quietly when one person practises calm treat-scattering and another wheels the vacuum out past his nose twice a day or teases him with it. Agree as a household: the vacuum emerges without ceremony, cleaning near his resting area happens when he is out of the room, and nobody points the dock corner out to him as a joke. Keep a note of how close he settles to the dock without reacting, week by week — distance shrinking is progress you can measure. KinsLe's Care Teams lets everyone follow those same dock rules and record his comfortable distance, so one person's cleaning day does not undo another's training.