Dogs should not eat marshmallows. Marshmallows contain high amounts of sugar and often include xylitol, a sweetener that is extremely toxic to dogs. Even a small amount can cause serious health problems such as hypoglycemia, seizures, liver failure, pancreatitis, and digestive upset. Moreover, the high sugar content can lead to obesity, diabetes, dental issues, and other metabolic problems over time. Marshmallows offer no nutritional benefit to dogs and can cause choking or digestive blockages if they expand in the stomach. If a dog consumes marshmallows, especially those containing xylitol, immediate veterinary care is necessary. In summary:

• Regular marshmallows are unhealthy and can cause stomach issues, pancreatitis, and obesity.
• Sugar-free marshmallows containing xylitol are highly toxic and potentially deadly.
• Even small dogs are vulnerable to sugar-related complications.
• Safe alternatives for treats should be used instead of marshmallows.
• If ingestion occurs, consult a veterinarian promptly.