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How do I track my pet's weight?

Log a weigh-in now and then, at home or at the vet, and VetVitae draws the chart and the change since the last one. Set a target range on the profile, and the weight tells you when it is above or below it.

Updated October 21, 2026

  1. Open your pet and tap Weight.
  2. Tap Log weight.
  3. Type the Weight. The unit is fixed in the field, so you only type the number.
  4. Pick where it was Weighed: At home or At the vet.
  5. Add a Note if it helps, like "After breakfast".
  6. Tap Save weight.

You can also tap Log weight on Home. With more than one pet, it asks which one first.

What do the latest weight and the chart show?

The top of Weight shows the latest weight, the change since the one before, and one line about the target: "In the target range", or how far above or below it is. Weights from the vet are drawn as solid dots and weights from home as hollow ones.

  • Pick the period: 6m, 1y (the default) or All.
  • When your pet has weigh-ins from both places, pick Both, Home or Vet to compare like with like. The list below follows the same choice.
  • The chart needs two weigh-ins in the period to show a trend.

Under History, every weigh-in is listed newest first, with the change from the one before, its note and where it was weighed.

How do I set a target range?

The target range is set on your pet's profile. Tap Edit, and under Health fill in Target weight range, the lowest and the highest weight your vet is happy with. The chart shows it as a band. A weight outside it shows a warning on the weigh-in and on the profile, and nothing is blocked.

How do I switch between kg and lb?

Use the kg | lb switch at the top of Weight. The choice is saved on your account, so it follows you to any device. Every weight is stored once and shown in your unit, so switching never changes a value. Each person who shares your pet can use their own unit.

What is the body condition score?

The body condition score is a 1 to 9 scale vets use to say whether a cat or dog is too thin, ideal or too heavy, from Emaciated to Severely obese, with 4 and 5 as ideal. It is optional on each weigh-in, under Body condition. Drag to score, or leave it empty. The latest score shows next to the latest weight.

Why is my pet weighed in grams?

Birds, small mammals, reptiles and fish are weighed in whole grams, with no kg | lb switch. Vets who see these animals weigh and dose them in grams, and one unit fits a 30 g mouse and a 3 kg rabbit alike. Other animals, like a mini pig, keep your kg or lb.

Birds have a Keel score from 1 to 5 instead of the body condition score: feel the breastbone in the middle of the chest, and 3 is ideal. See birds.

What is the weight loss warning?

For birds, small mammals and reptiles, VetVitae warns you when a weigh-in is 10% or more below the highest one in the last 30 days, or the last 3 months for reptiles. It reads, for example, "Down 11% since 21 Sep.", with a line on why it matters for that kind of animal. The warning shows on the weigh-in, on the Overview and on the page your vet sees, and the chart shades the period it looks at.

The warning goes away when a weigh-in comes back within 10%. You can always save, and nothing is blocked. For a reptile that laid eggs in that period, there is no warning, because females lose weight when they lay.

What to know

  • Under 6 months old, the latest weight shows how much your pet is gaining a week, and suggests a weigh-in every two weeks so the vet can follow the growth.
  • A weight typed on a deworming entry can be saved as a weigh-in too.
  • Fish have no weight. A group of birds has no weight section until a weigh-in is logged.
  • Deleting a weigh-in removes it from the chart and the history for everyone who shares your pet.

Questions

Can my partner see the weight in lb while I use kg?

Yes. Each person picks their own unit with the kg | lb switch, and VetVitae shows every weight in it. The weight is stored once, so the same weigh-in reads 4.5 kg for you and 9.92 lb for them, and nothing changes when either of you switches.

Does changing units change my old weights?

No. Every weight is stored once in the same unit and only shown in the one you pick. Switching between kg and lb changes how the numbers read, never the values. Editing a weigh-in without touching the number keeps it exactly as it was.

Can I log the weight taken at the vet?

Yes. Log it with At the vet under Weighed. It shows as a solid dot on the chart, apart from weigh-ins at home, and you can filter the chart to vet weights only. Weights from the vet are usually more precise, so the filter helps compare like with like.

Why does my puppy's weight say Growing?

Under 6 months old, with no target range set, the latest weight says Growing instead of comparing to a target. It also shows how much your pet gains a week, and suggests a weigh-in every two weeks while your pet is growing.

Why is there no body condition score for my rabbit?

The 1 to 9 body condition score was made for cats and dogs, so VetVitae only offers it for them. Rabbits and other small mammals are weighed in grams and get the weight loss warning instead. Birds get the keel score.

Can I log the same weight for two pets at once?

No. Weights are logged one pet at a time, since each animal has its own weight. On Home, Log weight asks which pet first.

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VetVitae is a record, not medical advice. Ask your vet about doses and schedules.