How a 15 kg dog handles raw kohlrabi peel
The fibrous peel of a raw kohlrabi bulb is tougher than the flesh, and your dog's digestive system isn't designed to break down such dense plant material efficiently. While his size means he's less likely to develop a full intestinal blockage from half a bulb's worth of peel, the unchewed pieces could irritate his stomach lining or slow down digestion. You might notice him licking his lips more than usual or seeming restless within the next few hours.
Gas production is common when dogs eat raw cruciferous vegetables, so don't be surprised if his stomach makes loud gurgling noises or he passes foul-smelling flatulence. The peel's rough texture can also cause mild irritation as it moves through his intestines, possibly leading to slightly looser stools than normal. What you don't want to see is repeated dry heaving without bringing anything up, or complete inability to keep water down.
What changes in bathroom habits signal trouble
Over the next day or two, monitor both ends of your dog's digestive process. At the front end, refusal to eat his regular meals suggests ongoing stomach discomfort, while at the back end, straining to defecate or producing very small, hard stools could indicate partial obstruction. Healthy elimination for a dog his size should still occur at least once daily, though the stool may contain visible plant fibers.
If he squats repeatedly without producing anything, or you notice him adopting an unusual posture with his back arched, these are more concerning signs than simple diarrhea. The peel's fibers can sometimes clump together in the colon, creating uncomfortable pressure. Fresh water availability is crucial now—dehydration makes any gastrointestinal issue worse by reducing gut motility.
When the next 24 hours matter most
The first day after ingestion is when most complications would appear if they're going to develop. While you don't need to hover over him constantly, do check on him every few hours for signs of distress like pacing, whining, or repeatedly changing positions as if he can't get comfortable. His abdomen should feel soft when gently pressed; any tightness or vocalization when touched warrants immediate attention.
Normal behavior would include perhaps one or two episodes of grass-eating or single vomits as his body adjusts, but anything persistent—especially if he brings up yellow bile more than twice—means his system isn't handling the peel well. Dogs often seek out cool tile floors when their stomachs ache, so note where he chooses to rest.
Why preparation method changes the risk
Had this been cooked kohlrabi without seasoning, the peel would be softer and less concerning, but raw plant cell walls are particularly resistant to canine digestion. The bulb's natural compounds that can cause gas are also more concentrated in the peel. Unlike the flesh which might just lead to loose stools, the peel adds mechanical irritation to the equation.
Size matters here too—a smaller dog eating this amount would be at greater blockage risk, while a giant breed might pass it with barely a gurgle. Your dog is in the middle weight range where individual variation plays a big role; his past experiences with fibrous foods (like carrot peels or celery) may predict how he'll handle this. If he's typically sensitive to diet changes, err on the side of caution.
The full verdict, portion guidance and serving notes are collected on the Kohlrabi food facts page.