Verdict: No, dangerous
Candy is generally dangerous for dogs due to various toxic ingredients like xylitol and chocolate, as well as high sugar content. Xylitol can cause life-threatening hypoglycemia and liver failure, while chocolate can lead to stimulant effects on the heart and nervous system. If your dog consumes candy, especially if it contains xylitol or chocolate, contact your veterinarian immediately.
Xylitol causes a rapid, dose-dependent release of insulin, leading to profound hypoglycemia and potential liver failure. Theobromine and caffeine are methylxanthines that act as stimulants, causing central nervous system, cardiovascular, and gastrointestinal effects. High sugar content can lead to pancreatitis and gastrointestinal upset. Artificial sweeteners can have various effects depending on the type.
Xylitol, chocolate (theobromine, caffeine), high sugar content, artificial sweeteners, other potential toxins (e.g., macadamia nuts in some candies)