For most owners, the honest answer is no. Two puppies from the same litter look like company for each other, and the breeder or rescue may present them as a ready-made pair, but raising littermates together is one of the most reliably difficult ways to start with dogs. A responsible seller will explain these risks to you rather than pressuring you to take a second puppy, and a seller who insists the pair must go together, with no discussion of separate training, is telling you something worth listening to.
The problem owners call littermate syndrome
Trainers use the term littermate syndrome for the pattern that often develops when siblings are raised side by side. The puppies bond intensely to each other and treat people as background, so recall, lead work, and basic cues land weakly because the most interesting thing in each puppy's world is its sibling. The pair may panic when separated, even for a vet visit, and some become so interdependent that one cannot cope alone in later life if illness or death divides them. Others go the opposite way as adolescence arrives and begin to squabble seriously with the one dog they cannot get away from. None of this is guaranteed, and the puppies themselves are not at fault, but the risk is common enough that many experienced trainers advise against the pairing outright.
The work and the cost both double
Everything about one puppy is demanding: toilet training, broken nights, chewing, socialisation outings, and training in short daily sessions. Two puppies do not halve that work by entertaining each other, because the work that prevents littermate problems has to be done separately. Each puppy needs its own training sessions, its own walks, its own trips to meet people, traffic, and other dogs, its own crate or sleeping place, and its own one-to-one time with you, alongside some time together. Feeding, vaccinations, insurance, and routine vet care are all individual too, so every bill arrives twice in the same week rather than spread across two dogs of different ages.
If your heart is set on two dogs
Take one puppy now, raise it properly for a year or more until its training, recall, and confidence are solid, then add the second dog. The older dog then helps the newcomer settle, the work peaks once at a time, and you can give each dog the separate start it needs. The pair still live as companions, which was the original attraction, without the sibling dependence.
If you already have littermates, or you take two on with your eyes open and plenty of daily time, the structure that prevents most problems is separation built into the routine: separate crates and sleeping areas, separate feeding, separate training and walks for much of each day, and deliberate outings where each puppy experiences the world alone with you. It is achievable, but it is a project, not a shortcut, and starting it from the first day is far easier than undoing a fused pair at eight months. Before deciding, ask the seller exactly what records, vaccinations, and early socialisation each puppy has had, puppy by puppy, rather than accepting one answer for the litter. When each puppy's profile is handed over through KinsLe's Transferrable Profiles, that individual history of records, feeding, and routines moves with the puppy to you intact, so neither dog's care has to start from zero.