I've had Max for 17 days and he's vomited 3 times. Yesterday he vomited yellow bile first thing in the morning, then this morning he vomited last night's dog food right after we brought him in from his first trip outside.

A few days ago after we took him for a long walk he came home and drank too much water and vomited that up.

He's never vomited more than once in a day, his belly's not swollen, and he doesn't seem to be in any distress.

Should I be concerned?