How to weigh your dog at home (and why it matters)

Why your dog’s weight is worth knowing

Your dog’s weight is the starting point for a surprising number of everyday decisions. Food packs give feeding guides by weight, and the PDSA points out that you need to know your pet’s actual weight first to decide whether they are underweight, overweight or about right, and how much to feed. Many parasite products are dosed by weight too — the PDSA notes that the right dose of wormer depends on your dog’s age and weight.^[1],[3]

Weight is also an early-warning signal. The PDSA advises weighing your dog regularly so you can tell if they have started to lose weight, and says to contact your vet if your dog is losing weight unexpectedly, especially quickly.^[2]

The bathroom-scale method

This works for small and medium dogs you can lift comfortably and safely. If lifting your dog would strain your back, or your dog dislikes being held, skip to the options for larger dogs below.

For the most comparable readings, weigh at a similar time of day, before a meal, with the same collar or harness on (or off) each time. Household bathroom scales may not be as precise as veterinary scales, so look at the trend over several weigh-ins rather than reacting to a small change on one day.

Making weighing easy for your dog

Some dogs dislike being picked up or standing on an unfamiliar surface. Keep sessions short and calm, lift your dog the same way each time, and reward them afterwards with a piece of their daily food allowance or a little praise. If your dog is anxious about being held, don’t force it — use the vet-practice option below instead. For small dogs and puppies, some owners find it easier to weigh a basket or pet carrier first, then weigh it again with the dog inside and subtract the difference.

Weighing a large dog

Lifting a large or giant dog isn’t safe for you or them. Instead, ask your vet practice whether you can pop in to use their scales between appointments — policies vary, so ring first. UK Pet Food notes that many vet practices run free weight-management consultations led by a veterinary nurse, and that a number of pet shops also offer free weight checks.^[6]

When you do visit, ask the vet or vet nurse to note the weight on your dog’s record. The PDSA suggests asking your vet or vet nurse for the best way to weigh your pet, which is especially useful for a dog that is too big to lift and too wriggly to stand still.^[1]

How often to weigh

There is no single schedule for every dog, but the sources give useful anchors:

Reading the trend, not the single number

The PDSA notes that a dog’s weight naturally changes by small amounts over time, especially as they get older. What matters is a steady pattern: a dog who is constantly getting thinner, or losing weight quickly, is a reason to speak to your vet. Plotting each weigh-in on a simple chart or spreadsheet makes a gradual change much easier to spot than comparing numbers in your head.^[2]

Body condition: the scales aren’t the whole story

Two dogs of the same breed and weight can be in very different shape, so it helps to check body condition alongside the number. The PDSA recommends using shape as well as the scales, and describes a hands-on Body Condition Score on a 9-point scale: run your hands along your dog’s sides — the skin should move freely over the ribs, which you should be able to feel with a light touch — and look from the side and from above, where you should be able to see a waist.^[4]

Vets often use the WSAVA (World Small Animal Veterinary Association) Body Condition Score chart for dogs, which runs from 1 to 9 with 5 as ideal. At the ideal score, ribs are palpable without excess fat covering, a waist is visible behind the ribs from above, and the abdomen is tucked up when viewed from the side. UK Pet Food’s printable Dog Size-O-Meter offers a simpler owner-friendly chart, and suggests standing behind your dog with your thumbs either side of the backbone and spreading your hands across the ribs, which should be easy to feel without excessive fat.^[5],[6]

Why dose-by-weight supplements need the current weight

Any product fed by weight band — including DIGEST+ — only gives the intended daily amount if you use your dog’s current weight, not the weight from their last vet visit a year ago or the breed average. Puppies, dogs on a weight-loss plan and older dogs can all move between bands.

Once you have a fresh weight, the dose calculator shows the matching band. You can also go straight to a band: up to 10 kg, 11–25 kg, 26–40 kg or over 40 kg. If your dog sits close to a band boundary, weigh again before deciding.

If your dog is under veterinary supervision, consult your vet before using DIGEST+ or any other supplement — and share your weight log with them; it is useful information for your vet too.