Water, and watch him. I would call my vet. My dog was a big puppy, 75# of busy. Would still do it. I laughed after I found out he was ok. My vet recommended chips too.
Whenever a human or animal is at risk or you are not sure I recommend seeking professional opinions.
You will eventually find very few people in a weed forum agree on anything but most state their opinion as fact. Kind of disturbing really when you think about what is at stake. But here we are. Lol