Identity and origin records
Open the file with who this puppy is: name, breed or mix, sex, color and markings, date of birth or best estimate, and where the puppy came from, with the breeder or rescue's details. Record the microchip number as soon as there is one — and verify it scans at the first vet visit — plus which database your contact details are registered with. Keep the sale or adoption paperwork, any registration documents, and early photographs in the same place. These basics are what prove identity and ownership, reunite lost dogs with families, and anchor every medical record that follows.
Health and treatment dates
Log every vaccination with its date and what it covered, every worming and flea treatment with the product used and the date given, and the date the next treatment is due — this running list is the single most useful page in the file. Add each vet visit with the reason, what was found, and what was advised or given, in plain words while you still remember them. Note illnesses and injuries between visits too: the vomiting episode that settled overnight, the limp after the long Sunday walk, the ear scratching that started in spring. Patterns a vet can see in dated notes are far more valuable than an owner's best recollection months later.
Weight, food, and growth notes
Weigh the puppy regularly and record the figures with dates; a growth curve shows at a glance whether a puppy is climbing steadily, stalling, or surging too fast, which matters especially for large breeds. Alongside weight, keep the feeding record: which food, how much per day, how many meals, and every change you make and why. When a stomach upset or an itchy patch appears, the food history is the first thing you and the vet will want, and it is impossible to reconstruct accurately from memory. Note developmental milestones too — first season for females, testicles descending, adult teeth arriving — with rough dates.
Behavior, training, and everyday life
Records are not only medical. Keep brief notes on training progress, classes attended and what was covered, fears that appear, and socialization experiences — the traffic outing that went well, the fireworks night that did not. Log anything a future carer would need: the routine the puppy settles under, commands understood, how the puppy travels, what soothes and what overexcites. If anyone else ever has to look after this dog — a sitter, a boarding kennel, a family member in an emergency — this section is the difference between a stranger guessing and a carer following a known routine.
Keeping it all in one place
A record only helps if it survives: paper cards get lost, phone photos scatter, and different family members keep fragments in different places. Keep one master file, back up photographs of paper documents, and review it at each vet visit to fill gaps while they are recent. Bring the whole record to appointments, grooming firsts, training enrollments, and any boarding stay rather than relying on reception staff to have it. KinsLe's Pet Passport exists for this exact habit — a puppy's identity, vaccination history, weights, feeding, and care notes held together in one portable packet that is ready for a vet visit, a trip, or a handover without a last-minute scramble through drawers.