Theobromine poisoning is by weight, so the bigger the dog the more it would need to ingest to get hurt/die. The seeds have the highest concentration but young leaves do contain the alkaloid. 100mg/kg is the danger zone for dogs. Question is would a dog even like munching on the leaves, maybe a fruit pod... definitely some chocolate lol. My dog loves chocolate. She tends to avoid the various plants that I have that are poisonous, but loves eating grass.