My dog ate a pork dish that had a mulberry sauce glaze — is the sauce harmful?

The mulberry itself is likely fine, but the sauce is the concern. Sauces often contain ingredients like onions, garlic, sugar, or xylitol which are toxic to dogs. Ripe mulberries in small amounts are safe, but you don't know what else is in that glaze. Watch your dog for vomiting, diarrhea, or lethargy over the next day. If the sauce was just a simple reduction of berries, risk is low, but if any worrying signs appear, or if the dish contained other risky ingredients, call your own vet for guidance.