Choosing a giant breed is an emotional decision with a practical edge: the dog will be enormous, and the years you share will be fewer than with a small breed. Leonbergers typically live around eight to ten years, which is normal for a dog of this size but still shapes what you should ask. The breeders who take lifespan and joint health seriously expect detailed questions on both, keep records across generations, and answer with specifics about their own dogs rather than with general reassurance about the breed.
Lifespan questions that reveal how a breeder works
Ask how old the puppy's dam and sire are, how long their parents and grandparents lived, and what those older dogs died of. One early death proves little, but a pattern matters, and a breeder who knows the ages and causes across the family tree is a breeder who selects with longevity in view. Ask whether the lines behind the litter have seen much bone cancer, since giant breeds carry a higher risk of it and honest breeders will discuss where it has appeared rather than claim it never happens. Ask, too, what the breeder does with this information: which pairings they avoided, and which older dogs they deliberately bred from because those dogs stayed sound and healthy into old age.
It is also fair to ask about the everyday end of lifespan: how their Leonbergers age, when grey muzzles and slower stairs usually arrive, and what they advise owners to plan for in the final years. The answers tell you whether you will have an experienced guide later, not just a seller now.
Joint questions for a dog built this large
A Leonberger carries a great deal of weight on its joints, so ask for both parents' formal hip scores and elbow grades, recorded with a recognised registry, and ask to see the certificates rather than a summary. Ask what the scores mean relative to the breed's overall results, because a breeder should be able to place their dogs' scores in context. Ask whether there is any history in the lines of cruciate ligament injury or of young dogs needing joint surgery, and how the breeder responds when a puppy they bred develops a joint problem — the answer reveals whether health reporting flows back to them at all.
Rearing questions matter as much as scores. Ask how the puppies are raised underfoot: what surface they walk on, whether they are kept from endless stair climbing and rough play with much larger dogs, and how their weight is managed, because a giant puppy grown too fast and too heavy loads developing joints in ways good genes cannot fully offset. Ask what food the puppies are weaned onto, when the breeder advises changing to adult feeding, and what growth rate they like to see at checks.
Questions about your side of the bargain
Good breeders will turn some questions around, and you should welcome it. Expect to discuss keeping the dog lean for life, since every spare kilo is carried on those hips and elbows, and building exercise gradually while the growth plates are still closing rather than walking a young giant for miles. If a breeder instead promises that their lines never have joint problems and longevity is excellent across the board, treat the confidence itself as the warning sign.
Gather the certificates, the relatives' ages, and the rearing advice into one place before the puppy arrives, so your vet can plan growth checks against the real family picture. KinsLe gives that bundle a permanent home in the Pet Passport, where the parents' scores and the line's history sit alongside your puppy's own veterinary records from the start.