Why portion size matters for a 15 kg dog
While bok choy isn't toxic, a 15 kg dog's digestive system isn't designed for large vegetable portions. The high fiber content can cause loose stools if introduced too quickly or in excessive amounts. For this weight class, think of bok choy as a garnish rather than a meal component—about what would fit in your cupped palm when chopped.
Rotate bok choy with other safe vegetables to provide variety without overloading their system. The stems, while not harmful, should be diced smaller than the leaves to prevent intestinal irritation. If you notice increased gassiness or changes in stool consistency after introducing it, scale back to thumbnail-sized portions.
The twice-weekly limit for leafy treats
Even with safe vegetables, frequency matters as much as quantity. Offering bok choy more than twice weekly could displace essential nutrients from their regular diet. Dogs this size need balanced commercial food as their primary nutrition source—think of vegetables as comprising no more than 10% of their total intake.
Space out bok choy treats with at least two days between servings to allow their gut microbiome to adjust. Watch for subtle signs like slightly softer stools or increased thirst, which might indicate they're getting too much plant matter. These signals are more telling than weight alone when determining appropriate portions.
Preparing stems versus leaves safely
The white stems require different handling than the green leaves due to their tougher cellulose structure. For a 15 kg dog, chop stems into pieces no larger than pea-sized to prevent potential choking or intestinal blockage. The leaves can be torn into slightly larger pieces—about dime-sized—as they break down more easily during digestion.
If steaming, ensure the bok choy cools completely before serving, as heat can make the stems gummy and more likely to clump together in the throat. Never serve it straight from the refrigerator either—room temperature is safest to prevent stomach cramping in medium-sized dogs.
When vegetable treats become too much
While bok choy itself isn't dangerous, any sudden increase in fiber can cause problems. For a 15 kg dog, consuming more than half a cup at once might lead to noticeable digestive upset. Signs like excessive gas, abdominal discomfort, or diarrhea mean you've crossed their personal tolerance threshold.
Remember that treats—even healthy ones—shouldn't replace balanced meals. If you're using bok choy as a training reward, reduce their regular food slightly to account for the extra calories. Dogs this size typically handle small vegetable portions well, but their individual tolerance can vary based on activity level and usual diet.
The full verdict, portion guidance and serving notes are collected on the Bok choy food facts page.