You send a document to print and your dog runs across the room barking at the machine. A printer can click, beep, and move without warning. Do not repeatedly trigger it to see whether the dog will settle this time. Let them rest in another room when you need to print, especially if they approach the moving paper tray or chew cables.
If sound sensitivity is new or spreading to other noises, talk to your veterinarian. A qualified, reward-based behavior professional can help if the dog panics rather than barking briefly. Keep cords, ink cartridges, and paper supplies out of reach, an ingestion is a veterinary question, not a training one.
Practice in small pieces
Show the idle printer from a distance and reward your dog for calm behavior. On another day, touch a button or move the paper tray by hand without starting a full job, then reward and finish. Later, ask a helper to run a short print while the dog is comfortably far away and you can attend to them. Stop before they bark, or make the next attempt quieter and farther away. If they freeze, hide, or refuse food, slow down.
If you print rarely, keeping your dog in a peaceful room may be all the plan you need. Training a sound is useful when it improves everyday life, but no dog has to supervise office equipment. If the printer's sound is the trigger, the household noise-fear guide can help with low-pressure sound practice, let your dog leave the room during real printing
Sources: Dogs Trust: What to do if your dog is scared of loud noises. VCA Animal Hospitals: Reducing Fear and Stress with Desensitization and Counterconditioning.