Treats! Lots of them! It’s surprising how many times people forget to pick up some treats before they leave home. I would also suggest buying some treats which they don’t usually have so you are more exciting for them during the photoshoot. If your dog also loves to play with toys, I would bring along their favourite one. Don’t forget to also put on your dog’s smartest collar. I would suggest avoiding harnesses for photos because they aren’t terribly pretty and bring along a thin lead (extendable ones are good) so that if we need to pop one on for some photos, I can remove it fairly easily afterwards.