Is my pet overweight? Do this with your hands

The number on the scale tells you little on its own. What vets actually use is body condition score, and you can do a decent version at home in thirty seconds, with your hands rather than your eyes. Eyes lie: you see your animal every day, and the change is slow.

Ribs first. Lay both hands flat on the sides of the chest and press very lightly. You should feel the ribs the way you feel the knuckles on the back of your hand — distinct, with a thin covering, not sharp. If you have to push to find them, your animal is carrying too much. If they stand out visibly, too little. Then the waist: look down from above. There should be a clear inward curve behind the ribcage; a straight-sided or oval outline means overweight. Then the tuck: from the side, the belly line should rise from the ribcage toward the hips. Level or sagging means overweight. Cats have one extra trick — the loose flap of skin swinging under the belly is a normal primordial pouch. Pinch it: a thin flap of skin is fine, a firm rounded mass is fat.

Do this on the first of every month, the same way each time, and photograph them from above and from the side. The photos show what the room hides.

Why the bag over-feeds: the feeding guide is a starting range for an average animal of that weight, and it usually assumes the animal is already at its ideal weight, not its current one. Neutering lowers energy needs by roughly a fifth to a third, and the guide does not know your animal is neutered. Finally, the cup: people scoop by eye, and the same cup varies by twenty or thirty percent between two people in one household. Weigh the food on a kitchen scale, in grams. That one change fixes a lot of dogs on its own.

Cutting calories without a starving, counter-surfing animal comes down to four levers. Volume: split the same daily ration into three or four meals instead of one or two, and for dogs bulk it out with vet-approved low-calorie vegetables such as green beans or cucumber; for cats, wet food does this better, because water adds volume without calories. Timing: put the largest meal just before the hour they usually beg, and if they graze, lift the bowl after fifteen to twenty minutes so you know what actually went in. Treat budget: treats should be at most ten percent of the day's calories, and they come out of the ration, not on top of it. Do the arithmetic once and it is sobering — a small dog's entire treat allowance can be two or three biscuits. Use their own kibble, counted out of the bowl, as training rewards. And the household: the most common reason a weight plan fails is a second person feeding in secret. Put the day's food in one container in the morning; when it is gone, it is gone.

Speed matters, and your vet sets the target. Losing weight too fast is dangerous, particularly in cats, who can develop a serious liver problem if they stop eating or drop weight abruptly; a cat should never simply be given an empty bowl. And if your animal is heavy despite modest food, is losing weight without you trying, or is short of breath, that is a conversation with your vet before it is a diet — some of these are hormonal or cardiac problems, and food will not fix them.