I live in Barbados, and can't seem to get anything that I need.
I go to the pet store, in the aquarium section, they have activated charcoal that's in small pellet forms (looks like small pieces of coal). every time I see my darn goat eat avocado, I sprinkle it in her food. she eats it with the rest of it. if I were really worried, i'd probably put the pieces in a blender/coffee grinder so I can drench.