Verdict: No, dangerous
While not acutely toxic in small amounts, excessive sugar intake is dangerous for dogs due to its long-term health effects. It can lead to obesity, dental problems, and increase the risk of developing diabetes mellitus and pancreatitis. Ingestion of large quantities can also cause gastrointestinal upset.
Metabolic overload leading to insulin resistance, fat accumulation, and inflammation; osmotic effects in the GI tract.
Sugar (sucrose, glucose, fructose)