0.015 mg = 15 μg. According to erowid.org, the threshold dosage for LSD averages around 20 μg. It sounds like this isn't enough to significantly effect a human, let alone elephants. Am I missing something?
You are missing 0.015 mg of a sense of humor.
Clue #1: My comment was a joke.
Clue #2: Jokes aren't necessarily funny.
Clue #3: Even if a joke isn't funny, it is still a joke.
Clue #4: Jokes, whatever the degree of funnyness, are not appropriately responded-to by "How did you come about such-and-such a miscalculation? I demand citations." My calculations were deliberately fallacious; see Clue #1.
This website is sometimes like a frickin' Aspergers asylum.
It's cool.