How cooking changes risks for an 8 kg dog
Heat breaks down cell walls in the cherry skin, making it easier to digest than raw—your dog's stomach acid will handle it without extracting any concerning compounds. At this weight, one cooked cherry is roughly the equivalent of a human eating two grapes, well below worrisome thresholds even if the pit had been present.
The warmth might actually make it more appealing, but doesn't increase toxicity. Watch for pacing or whining that suggests discomfort, though these are rare from such a small amount.
Why the next 24 hours matter most
While cyanide isn't a concern here, sudden diet changes—even minor ones—can trigger pancreatitis in some dogs. Your 8 kg companion showing disinterest in breakfast tomorrow would be more telling than immediate reactions. Check for firm stools on their next walk; loose ones indicate the fruit's fiber didn't agree with them.
Hydration helps flush any irritants. Add extra water to their kibble tonight, or offer ice cubes if they're reluctant drinkers. Avoid fatty treats for 48 hours to ease digestion.
Comparing skin-on versus pitted cherries
Leaving the skin on actually reduces mess—it contains pectin that binds loose stool, whereas pitted cherries release more sugar at once. Your dog might seem slightly thirstier tonight from the natural sugars, but this isn't dangerous unless they have diabetes (which wasn't mentioned in the question).
One cooked cherry with skin has less impact than a spoonful of commercial dog treats. The main advantage of peeling would be avoiding red-stained fur around the mouth if your dog is light-colored.
When cooked fruits become tricky
This single cherry poses no issue, but owners should know that cooking concentrates sugars in larger quantities. Compotes or syrups made from cherries—even without pits—can cause blood sugar spikes in small dogs. Your scenario differs because it's one whole fruit retaining its natural water content.
Should your dog ever get into a batch of cooked cherries, count how many were in the pan before you stopped them—that number matters more than cooking method.
The full verdict, portion guidance and serving notes are collected on the Cherries (pits removed) food facts page.