No, don't give jellybeans to dogs. The high sugar content in jellybeans can lead to many health issues for dogs. In addition, some jellybean flavors may contain toxic substances that are poisonous to dogs, such as coffee and chocolate.
Risks
Jellybeans are high in sugar, and feeding it to dogs in large quantities can result in an upset stomach. It also puts them at risk of developing diabetes, tooth decay, and obesity.
Jellybeans contain ingredients that may be toxic to dogs, such as caffeine, artificial flavorings, xylitol, preservatives.