Peaches are rich in fiber and vitamin A. However, canned peaches and peach pit are harmful to your dog. Canned peach contains a high amount of sugar. They may also contain preservatives and xylitol, which are disastrous to your dog’s health. Additionally, the peach pit contains cyanide called amygdalin. Your dog’s throat may also be exposed to danger if he or she swallows a whole peach. It can stick in their throat. The serrated and rough surface can also irritate your dog’s intestines.