Q.Are Elephant Ears poisonous to dogs?
Is it true that elephant ears will cause ground moles to leave? If so, do they have to be planted in ground or can they be planted in planter and set in yard? And are elephant ears poisonous to dogs?
Yes, Elephant Ears are listed toxic to dogs and all pets.
I found no evidence or research showing a link of this plant deterring moles or rodents.
Here are some links that may help you.
https://www.gardeningknowhow.com/ornamental/bulbs/bgen/protect-flower-bulbs.htm
https://www.gardeningknowhow.com/plant-problems/pests/animals/mole-control.htm