Cat Weight Loss Guide

Cat weight loss fails when the plan is vague: “smaller scoops,” “fewer treats,” or “more play.” Cats are small enough that a few extra grams can erase the deficit. The reliable approach is to measure both sides of the system: body condition and food energy.

Start by checking your cat's Body Condition Score and breed weight range. If your cat is BCS 6-7, a careful home plan may be reasonable. If your cat is BCS 8-9, eating poorly, diabetic, hyperthyroid, or has kidney disease, get veterinary guidance before reducing calories.

Use the target or ideal weight, not the current overweight weight, when calculating a weight-loss target. A 15 lb cat whose healthy target is 12 lb should not be fed as if 15 lb is the goal.

The fastest path is to use the Cat Calorie Calculator with current weight, target weight, and food kcal per 100 g. If you calculate manually, convert pounds to kilograms, compute RER, then multiply by the weight-loss factor.

Cups are too imprecise for cat weight loss. Kibble shape, scoop size, and how the cup is filled can change the meal by 10-20%. A kitchen scale turns the plan into a repeatable number.

If the bag says 380 kcal per 100 g and your cat's main-food budget is 180 kcal, the daily main-food amount is about 47 g. Split that into measured meals and keep treats within the 10% allowance.

Expect slow progress. A 14 lb cat losing 1% per week loses only about 0.14 lb weekly. That is normal. Daily fluctuations from hydration, litter box timing, and scale noise can hide the trend.

Weigh once weekly, same scale, same time of day. If there is no downward trend after three to four weeks, check for untracked treats, shared household feeding, and food density errors before cutting calories further.