I don't know if they did or it was a coincidence. His stomach did start making super loud gurgling noises after 2 consecutive doses of the drops and right when he started chowing down again. So, I have no idea.
He "free ranges" in the garage each evening, and had been chewing holes into a chicken feed bag that was left within reach before he started acting sick. Maybe he ate a bunch of that and was either full or sick? He does also have that watery eye, which the more I read seems like it could be because of a tooth problem. Maybe that was causing some kind of sore in his mouth that started to feel better after a few days. Who knows? But he's all back to normal now.
The chicken food may have been a part of it. It just isn't what rabbits should be eating, and he probably ate way too much. Rabbits do not have good self control; they will eat until they get sick.
If your garage is dusty, that could have been the cause of the watery eye.