A healthy adult dog usually needs the scales about once a month, and that rhythm exists for one reason: slow drift is invisible week to week, yet a monthly figure written down exposes it while a small feeding adjustment can still correct it. Puppies belong on the scales far more often, every two to four weeks during growth, while a senior dog or one managing a health condition should follow the interval your veterinarian sets — and a dog slimming under supervision may be weighed fortnightly so the plan stays honest.
Weight Is a Number; Condition Is the Verdict
Pair the scales with a hands-on condition check each time: ribs felt easily under a thin fat layer, a visible waist from above and a tuck from the side. Scales alone mislead — muscle, coat, and a big drink all move them — while condition scoring catches what matters. Keep the numbers dated in one place, because the dangerous changes are slow ones: two or three kilos across a year in a medium dog is a significant health drift that no single weigh-in reveals. Unexplained weight loss in particular is never 'just getting older' — appetite, drinking, and stool changes alongside it point somewhere, and a vet should hear about a loss of more than about five percent of body weight without a diet change.
At home, the hold-and-subtract method works for dogs you can lift safely: weigh yourself holding your dog, then weigh yourself alone, and take the difference. Bigger dogs can usually be weighed on the large scales many clinics keep near reception, often without an appointment or charge if you ask first. Use the same scales, at a similar time of day, for figures you intend to compare.
What to Bring Your Vet, and When
For a weight conversation, your veterinarian needs a series rather than a snapshot: the last few dated figures, plus brief notes on appetite, drinking, activity, and stools across the same weeks. Those jottings let the vet judge whether a change matches a new food, a quieter month, or something that deserves examination and blood work. Anything you have filmed — a dog suddenly reluctant on stairs, or panting at rest — can add useful context at the appointment.
Book that check promptly if the scales show unexplained loss or gain beyond roughly five percent of body weight, or if weight change arrives together with altered thirst, appetite, or energy. Growing puppies who fall off their expected curve, in either direction, also deserve a conversation before the next routine visit rather than after it. Bring that record along in the Pet Passport on KinsLe — a portable packet where weigh-in dates, notes, and past treatment history travel together to each visit.