Why together is the problem, not the shortcut
Two puppies trained side by side mostly learn to watch each other. One lunges at the treat pouch, the other joins in; one barks at a noise, the second barks at the first. Skills taught in that shared excitement are weak, because neither puppy is actually attending to you, and the shyer puppy often just copies the bolder one's choices instead of learning to think. Training separately is not about favouritism — it is how each puppy builds an individual relationship with people, learns cues in their own name, and develops confidence that does not depend on the other puppy being in the room.
Set the house up for genuine separation
Real separation means the waiting puppy cannot see or easily hear the session. Use different rooms with a closed door, separate crates in different spaces, and a chew or food puzzle to keep the waiting puppy settled rather than screaming for release. Rotate the order daily: the puppy who trained first yesterday waits first today, so neither always learns while fresh and the other while tired and fractious. Keep each solo session very short — a few minutes of one skill, such as name response, a hand touch, or walking a few steps on a leash indoors — then swap. Short and successful beats long and chaotic for both puppies at this age.
Give each puppy a separate life, not just separate lessons
Extend the separation beyond formal training. Walk the puppies individually so each learns leash skills, meets the world at their own pace, and can be rewarded for checking in with you instead of wrestling the other puppy at the end of a shared lead. Feed them apart, let them nap apart, and build in solo trips — one puppy rides along on a short errand while the other rests at home. These individual outings are where you will spot genuine differences: one puppy may be bold with new surfaces but worried by traffic, the other the reverse, and each needs training shaped to what you actually see in them alone.
Manage the together time you do allow
Puppies should still play together, but supervised play with breaks is different from living as an inseparable pair all day. Interrupt wrestling that tips into frantic, over-aroused scrambling, separate them for a breather, and reward calm behaviour around each other — settling on separate mats in the same room is a skill worth paying for. Watch for warning signs that the balance is off: one puppy who cannot settle if the other leaves the room, who will not eat, play, or respond to their name without the sibling, or who panics on a solo walk. Those signs mean the independent time needs increasing gradually, with patience, not that the puppies should be kept together even more.
Track two puppies as two individuals
Keep separate notes for each puppy: which cues each knows, what each found hard this week, what each is ready to learn next. It is surprisingly easy to teach the quicker puppy a skill, assume both have it, and discover weeks later that the second puppy was only ever copying. A shared household rota that assigns each puppy's solo training, walk, and settle session in KinsLe Care Teams — and marks each one done with a timestamp — makes sure both puppies get their own time even on busy days, and gives everyone in the house the same clear picture of how each youngster is progressing on their own four paws.