I just learned about nandinas being toxic from a P. Allen Smith facebook post & I have some. It was pointed out that the seeds are what hurts birds, animals & people so to keep seeds cut at all stages. I have a dwarf variety planted 25 years ago by the home builder as foundational landscaping & although only 4 ft. evergreens they are so invasive I'm thinking seriously about removing the 5 or 6 plants. They love moist areas & get the drip of the house which fuels their spreading by root shoots year around. Think long & serious before planting even dwarf ones.