Dried plums with a stronger effect than fresh ones
A prune is a dried plum, and drying concentrates everything: the sugars, the fibre, and the naturally occurring sorbitol that gives prunes their famous loosening effect on people. In a dog, that concentration translates quickly into wind, gurgling, and diarrhoea, which is why prunes sit firmly in the do-not-offer category even though plum flesh itself, fresh and stoneless, is not among the most dangerous fruits. The soaked prunes in your recipe bowl add a practical complication: soaking softens them into exactly the slippery, gulpable texture a stealing dog can swallow whole, stones and all, before you turn around.
First, establish what he actually stole
Count what is left in the bowl and check the packet or your recipe to answer two questions: how many prunes are missing, and were they sold as stoned or whole? A dog who took two stoneless prunes faces mainly a digestive upset; a dog who may have swallowed prunes with stones faces the additional risks of a gut blockage and of chewing a stone, since plum-family stones contain compounds that are toxic when crushed and eaten. Look for chewed stone fragments on the floor near the scene. If the count suggests a stone is inside the dog, contact your vet for advice today rather than waiting for symptoms, because early guidance is straightforward compared with a later blockage.
The digestive fallout to expect and manage
For the more likely stoneless scenario, expect loose stools within the next day, possibly several, along with wind and a noisy stomach. Keep his meals plain and normal, let him out more often than usual, and make sure water is constantly available, since diarrhoea costs fluids. Do not add more fruit or rich food to settle him. If he is a small dog, a puppy, or a dog with an existing health condition, lower your threshold and phone the vet for tailored advice even if he currently seems bright. Brightness is reassuring, but prunes are one of those foods where the full effect can take hours to declare itself.
When the worktop theft becomes a vet visit
Prunes hidden inside baked goods count as well: a dog who steals a prune-filled pastry or a corner of a sticky pudding has eaten the same concentrated fruit, plus added sugar and fat. Keep recipe bowls, cooling trays, and the finished bake itself behind a closed door or on a high shelf until serving, and tell anyone slicing the result that the dog's share is his own biscuit, not a prune corner.
Seek veterinary help promptly if vomiting joins the diarrhoea, if stools become watery and frequent, if he strains without producing anything, goes off his food, or seems sore in the belly, or if you know or suspect a stone was swallowed and he starts gagging or drooling. Keep the prune packet to show or describe, since whether the fruit was stoned is the detail your vet will ask for first. Afterwards, move soaking bowls to the back of the worktop or into a closed oven or microwave, because a dog who has stolen successfully once regards that bowl as his. Adding prunes to the keep-away list in KinsLe through Care Teams makes the rule visible to anyone else cooking in your kitchen, not just the person who caught the theft.