Cotton (Gossypium) is a plant that is poisonous to dogs and cats. The toxin in cotton is the tigliane phorbol ester (or crotoxin) in seed oil, which can cause giddiness and nausea in dogs and cats. If your dog or cat has eaten cotton seeds, please have them see a veterinarian immediately.
What is Croton?
Croton is not poisonous if a pet inadvertently ingests it by eating a seed or eating foliage. A Croton fruit ripens to a sweet juicy pulp, and is edible to many animals; however, it will not cause significant poisoning.