Teach the photo spot before anyone picks up a camera
Calm photo dogs are made in rehearsal, not on the day. In the week before, practise a simple station behaviour: your dog goes to a mat or blanket, settles, and is rewarded for staying while people arrange themselves around him, building up in short, cheerful sessions of a minute or two. Add the ingredients of the real shoot gradually, such as standing close together, smiling at something in front of him, and a helper making mild distractions, paying him generously throughout. A dog who understands that the mat is a job with wages arrives at the session with a task, while a dog meeting the whole performance cold has only one plan, which is to investigate the photographer.
Prepare the dog the session deserves
Walk him and give him a toilet break shortly before the photos so he is comfortably tired rather than frantic or desperate, and schedule around his usual rest time if he is a puppy or an older dog. Bring his highest-value treats, a familiar blanket or the rehearsed mat, and a favourite toy for attention between frames. Skip costumes and props he has never worn, however charming, because a dog worrying at an unfamiliar hat will not give you a relaxed face, and never force him to stay in position if he is panting, yawning repeatedly, or trying to leave; a short break restores more good frames than pressure does.
Run the shoot in short, handled bursts
Put one person in charge of the dog throughout: they position him on the mat, hold a loose lead if needed, deliver treats between frames, and step him out for breaks while the photographer adjusts the group. Ask the photographer to work in quick bursts and to capture candid moments between poses, because a dog's most natural, happy expressions usually appear when he has just been praised or is looking at his handler, not during the tenth held smile. Keep total session time short, with real breaks to sniff and wander, and finish while he is still enjoying himself so the next photo day starts from a good memory.
Brief everyone, and plan for the dog you have
Tell family members the rules in advance: no calling him from three directions, no grabbing for a cuddle shot he has not chosen, and children sit beside him rather than leaning over him. For a genuinely camera-shy or excitable dog, design the photo around him instead, perhaps the family seated on the ground at his level, or a walking shot where movement gives him something natural to do. Record the mat cue, his best reward, and the break pattern that worked in KinsLe through Family Sharing, so the relative who handles him at the next family gathering follows the routine he knows rather than improvising a new one.