Feeding & Nutrition

The scoop sitting in the kibble bin is a lie. Not a malicious one, but a lie all the same. Most of them hold somewhere between 1.5 and 2 cups when filled the way a human fills a scoop at seven in the morning, half asleep, one hand on the kettle. The bag says one cup. Your dog has been eating forty percent more than you think for three years, and now the vet has used the word "obese" and you are standing in the kitchen feeling personally attacked.

Here is the thing nobody says kindly enough: this is arithmetic, not willpower. Pet weight loss fails because owners cut food by eyeball, see no change in a fortnight, get discouraged, and quietly go back to the old scoop. It works when you count calories once, properly, and then stop negotiating with yourself.

Start with a number. Not your pet's current weight, but their target. A vet can give you a body condition score out of nine, where four to five is ideal, and each point above that is roughly ten to fifteen percent excess body weight. A Labrador weighing 38 kg at a body condition score of eight is carrying something like 30 to 40 percent extra. Her target is closer to 27 or 28 kg. That target weight, not her current weight, is what drives the maths.

The working formula for resting energy requirement is 70 multiplied by target body weight in kilograms raised to the power of 0.75. For our 28 kg goal Labrador, that is roughly 70 × 12.2, or about 854 calories a day at rest. For weight loss, most vets feed at or slightly below that resting figure — often 1.0 times RER for dogs, sometimes 0.8 for stubborn cases under supervision. Say 850 kcal a day. Now look at the bag. If her food runs 380 kcal per cup, that is 2.2 cups daily, split into two meals. She has probably been getting three and a half.

Cats work the same way with different numbers. A neutered indoor cat with a target of 4.5 kg has an RER around 70 × 3.09, roughly 216 calories. Weight-loss feeding often lands between 180 and 200 kcal daily. A typical 85 g pouch of wet food carries 70 to 90 calories, so two and a half pouches, or two pouches plus a small measured portion of dry, covers it. That is far less food than most cats are getting, and it explains why so many indoor cats creep upward year after year on free-fed dry food.

The treat budget is where the plan quietly dies

Treats should sit at or under ten percent of daily calories. For the Labrador that is 85 kcal. One large dental chew can be 90 to 120 calories on its own. A single strip of bacon rind from a Sunday breakfast is around 40. Half a slice of cheese is 55. Three of those a day and you have wiped out the entire deficit you carefully created with the measuring cup.

You do not have to stop giving treats. You have to stop giving expensive ones. Green beans, cucumber batons, a few blueberries, plain air-popped popcorn without butter, a single piece of the dog's own kibble counted out of the daily ration — these cost almost nothing calorically and the dog does not perform a cost-benefit analysis. Dogs value the event of being given something, not the mass of it. Break a training treat into four pieces and you have four rewards instead of one.

For cats, use part of the daily wet food as the reward. Smear a teaspoon on a lick mat. Hide portions of the measured dry ration around the house in three or four small dishes so she has to move to find dinner. That converts eating from a two-minute event into a twenty-minute foraging exercise, which does more for a fat cat than any diet formula on the shelf.

How fast is safe, and how to know it's working

Dogs should lose about one to two percent of body weight per week. Cats must go slower — half a percent to one percent weekly, and never more. Rapid weight loss in an overweight cat can trigger hepatic lipidosis, a genuine and sometimes fatal liver condition, which is why "just cut her food in half" is dangerous advice for cats and merely unhelpful advice for dogs. If a cat stops eating entirely for more than two days during a diet, that is a call to the vet, not a win.

Weigh every two weeks, same scale, same time of day. For small pets, stand on the bathroom scale holding them, then alone, and subtract. Write it down. A dog losing 250 g a fortnight looks like nothing on the scale and looks like a different animal after four months. Take a photo from above and from the side on day one. That waist you cannot see now will appear around week six and you will not believe it happened without the photo.

If eight weeks pass on a correctly measured ration with no movement at all, stop blaming the diet and get bloods run. Hypothyroidism in dogs and, less commonly, other endocrine problems will hold weight on regardless of calories. So will a neighbour who has been feeding your dog sausages over the fence, which happens more often than you would think.

A word on the food itself. Prescription weight-management diets are not a scam — higher protein and fibre with lower calorie density means the animal eats a satisfying volume while taking in less energy, which matters when your pet is genuinely hungry at five in the morning. But an ordinary good adult food, correctly measured, also works, and for a pet who needs to shed one kilo that is simpler and cheaper. Where the diet is severe, or arthritis, diabetes or heart disease sits alongside the weight, a veterinary nutritionist earns the consultation fee.

Use a kitchen scale rather than a cup. Grams do not lie and the scoop does. Weigh out the full day's ration into a container each morning, and everything the pet eats that day comes out of that container — meals, training rewards, the bit of chicken your partner sneaks under the table. When the container is empty, the day is over. It is the single change that turns a vague intention into an actual pet weight loss plan, and it takes about fifteen seconds.

The hardest part is not the pet. It is the household. One person quietly feeding "just a bit because he looked sad" cancels four months of careful calorie counting. Put the daily amount on the fridge in pen. Make it boring, visible and non-negotiable, and the weight comes off.