Weight is one of the clearest health signals a dog owner can track. Extra weight strains joints, worsens breathing and raises the risk of diabetes and other diseases, yet weight gain is slow and easy to miss when you see your dog every day. This free tracker charts weekly weigh-ins against a target your vet sets, and shows the loss per week so that too-fast loss is visible too. It is an educational tool only. Your vet decides the target weight and the safe pace, because those depend on breed, age, body shape and health.
To use the tracker, enter the weigh-in date and the weight in kilograms, then add the target weight and press the button. Each new weigh-in joins the list, which is saved in your browser, and the chart draws the trend. The tool also shows the total change so far, the average loss per week and the progress toward the target as a percentage. Weigh your dog at the same time of day on the same scale each week, ideally before feeding, because food, water and different scales can move the reading by enough to hide a real trend.
Here is a worked example. A dog starts at 30 kilograms with a target of 25 kilograms. After six weeks it weighs 27 kilograms. The total loss is 3 kilograms, the average loss is 0.5 kilograms per week, and progress toward the target is 60 percent, because 3 of the 5 kilograms are gone. That pace is steady and healthy for many dogs. A loss of 2 kilograms in a single week for the same dog would be a warning sign, not a celebration, because fast loss can mean muscle loss or illness rather than fat loss. The chart makes both patterns obvious at a glance.
Feeding is where most weight plans succeed or fail. Measure food with scales or a measuring cup instead of guessing, because a small daily overfill adds up to kilograms over months. Count treats in the daily total, and remember that table scraps count too. Many owners are surprised to learn that a few biscuits a day can equal a large share of a small dog’s needs. Ask your vet for a daily amount in grams rather than a vague instruction to feed less. Weigh the food for a week until the right portion becomes familiar by eye.
Exercise helps, but it cannot fix overfeeding on its own. A dog that eats too much will gain weight even with long walks, and an overweight dog may struggle with those walks in the first place. Build activity gradually, especially for dogs with sore joints, and watch for heavy panting or limping. Swimming suits many overweight dogs because it exercises without stressing joints. Play, training games and food puzzles also burn energy and keep a dog mentally busy, which reduces begging driven by boredom rather than hunger.
The most common mistake is changing the plan after one disappointing weigh-in. Weight fluctuates, and a single reading can mislead. Judge the trend over three or four weeks, not one week. Another mistake is letting different family members each give treats without telling the others, which quietly doubles the extras. A third mistake is switching foods constantly in search of a magic result. Stick with the vet’s plan for at least a month before judging it, and keep the weigh-in routine steady through that month.
Use the chart at vet visits. A vet who sees a clean trend line can judge the plan in seconds and adjust it with confidence. If the line flattens for a month, the vet may reduce the food amount slightly or check for a medical cause. If the line drops too steeply, the vet will want to see the dog promptly. Celebrate milestones honestly: a dog that reaches its target still needs a maintenance plan, because weight returns quickly when old portions return. Keep weighing monthly after the target is reached, so a small regain is caught early.
Spanish version: Registro de pérdida de peso en perros – Gráfica hacia el peso objetivo