An adult Shih Tzu typically weighs 4.5 to 7.5 kg (10 to 17 lb). Males and females overlap almost completely at this size, and height and frame separate individuals more than sex does. The breed standard describes a sturdy little dog, and sturdy is the right feel in your hands: solid through the body, neither bony nor padded. A dog at 7.5 kg (17 lb) can stand lean on a larger frame, and a dog at 5.5 kg (12 lb) can carry surplus on a smaller one. Trust touch over the chart every time.
Condition Under a Coat That Reaches the Floor
A Shih Tzu in full coat presents a flowing rectangle, and that outline tells you nearly nothing about the body inside it. Lift the coat and place your hands directly on the ribcage, expecting ribs under a thin fat cover that you can find with light pressure. Move backward to the waist and feel for a narrowing behind the ribs, and check from above with your palms when the visual waist disappears under hair. Dogs kept in a shorter pet clip give you an easier read, and a post-grooming check each trim keeps an honest record either way.
Fat gathers quietly in this breed around the neck and over the ribs, and it often arrives with reduced activity in hot weather or during a household's busy season. Note breathing effort on walks and recovery afterward, and mention heavier breathing, new snoring or heat distress to your vet, who can investigate breathing and other possible causes in a flat-faced breed and advise how weight fits the picture.
Companion Habits and Portion Traps
Shih Tzus live close to their people, and closeness creates constant small feeding moments: a corner of toast, a treat for settling, a second treat for being adorable about the first one. Weigh the daily ration in grams, hold back part of it for those ritual moments, and keep the total fixed even when the delivery charms you. Two measured meals suit adults well, and a consistent schedule helps you spot appetite change early, which matters in a breed whose illnesses often announce themselves at the bowl first.
Exercise stays modest by design, with short walks and indoor play suiting a companion build. Protect condition by keeping those short walks daily rather than heroic at weekends, and by keeping play active even when the weather pushes life indoors. A dog who gains despite honest measuring deserves a vet review, and a vet can investigate hormonal and other possible causes before you shrink portions further.
Small Dog, Shared Home, Single Record
Shih Tzus often belong to the whole household emotionally, and emotionally shared dogs get fed by everyone. Set one written target weight from your vet, weigh monthly on a kitchen or baby scale at home if the clinic scale feels stressful, and record rib feel beside each reading. Review three months together, since single readings bounce around with coat, water and timing.
The grooming table doubles as an examination stand in many Shih Tzu homes, since a dog who stands calmly for brushing will also stand for a careful rib check and a look at teeth and gums. Use that calm minute weekly and note anything new, including bad breath or sore gums, and pass those notes to your vet at the next visit. Warm homes and short winter walks shrink this breed's activity quietly, and a portion that suited an active summer can overshoot a sedentary winter within a single season.
With KinsLe Care Teams, one named person owns meals, another owns the weekly coat-lifted rib check, and the timestamped completions give a small dog one consistent story instead of several loving guesses.