Eating brownies can be dangerous for dogs due to chocolate, especially if your dog ate three. Chocolate contains theobromine, which is toxic to dogs. Signs of chocolate poisoning include vomiting, diarrhea, increased urination, rapid breathing, and even seizures. Contact your vet immediately. Be ready to share your dog’s weight, the type of chocolate, and the amount ingested. I once faced a similar situation when my dog consumed chocolate. Rapid action and veterinary help saved my furry friend. It’s crucial to act quickly to prevent serious complications. So, don’t hesitate – call your vet right away for guidance.