Seemingly Harmless Foods That Could Seriously Hurt Your Dog by pawbuzz on September 2, 2017 in Dog Food & Recipes, Dogs, Health & Diet, Popular 0 8. Cinnamon: No way! The oils in cinnamon can irritate a dog’s mouth and lead to diarrhea, vomiting, and liver disease. Definitely keep this away from your pup! Next Page » Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19