Puppy ran away: what is different from an adult dog
A puppy has less health protection, may not know your name or home, changes fast in looks, and may be picked up quickly, so act sooner and update your records.
What changes when it is a puppy
A missing puppy needs the same first steps as any dog, but four things are different. Its vaccines may not be finished, so it has less protection. It may not yet know your street, your name for it, or how to come when called. It is small and appealing, so a stranger may pick it up within minutes. And it grows so fast that your photo may be out of date. Start now: look close to home in small spaces, call shelters and vets today, and check that the microchip is really in your name. None of the behavior notes below come from studies of lost puppies, because we could not find any.
Search small, and search close
A small puppy fits where a Lab cannot. Check under cars, behind appliances in the garage, inside window wells, under low decks, in hedges and in gaps behind fences. Look down, not across. Check drain openings and any hole near where the dog got out, then return to them later. Young puppies tire quickly, so start with a tight circle and go through it twice before you widen it. Neighbors should look under their own decks and cars, because a puppy may crawl in and sleep there. Stop often and listen for whining. A soft voice is fine for a very young puppy that has not been frightened, but go quiet if it runs from you.
How age affects behavior
VCA Animal Hospitals calls 3 to 16 weeks the sensitive period for socialization, when puppies are most open to new experiences. The Merck Veterinary Manual says puppies stay most receptive to learning about new situations until about 16 to 20 weeks. A young puppy that has met many friendly people may walk up to a stranger. A puppy that has met few people, or that came from a kennel or a rescue situation, may hide from everyone. Adolescents between about 6 and 18 months are another matter. They can look grown up, run fast and ignore you, so treat a teenage dog more like an adult. These are general development notes, not rules about what your puppy will do.
Your puppy has little to go on
A puppy that has only been home for a week or two may not recognize your block. It may not yet have walked the route you are searching. Assume it cannot find its way home. If you have had it for only a few days, our post on newly adopted dogs who ran away fits your situation too. Use what the puppy does know: the sound of a treat bag it has heard at meals, its crate, its bed, its littermate if you can borrow one, or the person who feeds it. Put the crate and bed outside the door with the door open and someone watching from close by. If the puppy has been to a park or a friend’s house, check there.
Check the paperwork today
A puppy may leave a breeder, shelter or pet store with a chip that is still not registered to its new owner. Use the AAHA lookup with your chip number to find the registry, then call and confirm that your name and phone number are on the record, and mark the puppy as lost. The number should be on your vet or adoption papers. If you have no chip record, ask the breeder or shelter. Find a purchase contract, a vet record and clear photos, because you may need them to prove the puppy is yours. Collars on growing puppies can be loose enough to slip, so do not count on the tag still being there. Write that on your poster: may have lost its collar.
Keep the poster current
A photo from eight weeks can be wrong by 14 weeks. Use your most recent picture, and give the age and weight as they are this week: Puppy, 14 weeks, about 15 pounds, black with white chest. Coat color can shift as a puppy grows, so add any fixed marks, and keep one detail off the poster for checking callers. Add: Not fully vaccinated, please call right away. That line gives a person who picked up your puppy an honest reason to call. Do not write that the puppy is sick. Then ask people who may have seen a dog to think young: a person might describe a big puppy as a small adult dog.
Someone may already have your puppy
People find it hard to walk past a loose puppy, and a kind stranger may take it home, or may think nobody wants it. So check found-dog posts, your local Facebook groups, Nextdoor and listings for free or rehomed puppies. Ask vets if anyone has brought in a new puppy. Do not accuse anyone. If someone contacts you, ask them to tell you the detail you left off the poster, and be wary of requests for money up front. Keep calling every shelter nearby as well, because a stray hold can be only a few days, and a puppy can be available for adoption once it ends.
When you get it back
Call your vet the same day, and tell them how long the puppy was out and where. The Merck Veterinary Manual says parvovirus is most common in dogs from about 6 weeks to 6 months old and in those that are unvaccinated or not fully vaccinated. It spreads through contact with infected feces, and can survive for a long time in the environment. Ask your vet what to do about vaccines and how soon, and whether to keep the puppy away from other young dogs. Do not wait for symptoms. Your vet can also check for parasites, injuries and anything it may have eaten.
Sources
VCA Animal Hospitals, puppy socialization: vcahospitals.com/know-your-pet/puppy-behavior-and-training-socialization-and-fear-prevention. Merck Veterinary Manual, normal social behavior in dogs: merckvetmanual.com/dog-owners/behavior-of-dogs/normal-social-behavior-in-dogs. Merck Veterinary Manual, canine parvovirus: merckvetmanual.com/digestive-system/diseases-of-the-stomach-and-intestines-in-small-animals/canine-parvovirus. AAHA microchip lookup: aaha.org/petmicrochiplookup.