As a pet owner, it's up to you to decide which plants your dog will ignore and which ones they will take an interest in. Resins called grayanotoxins bind to and modify sodium channels, which allows calcium movement into cells and can lead to vomiting, diarrhea, abdominal painand refusal to eat. #5 Amaryllis. (Maybe only one thumb down for A. japonica variegata, the Gold Dust Tree. This category only includes cookies that ensures basic functionalities and security features of the website.