Vegetables that can poison your dog include mushrooms, rhubarb, those in the Allium family like onions and garlic, and some in the nightshade family such as unripened tomatoes or uncooked potatoes.

The fly agaric is the easily recognisable fairy-tale mushroom with a red cap and white spots. What symptoms do dogs show after eating a poisonous mushroom? Dogs that have eaten a poisonous mushroom ...