Help! Sage (4 months old) has bouts of vomitting occasionally, and we can't figure out what to do. She is otherwise healthy and happy, so I'm wondering if it's just a sensitive stomach. Sometimes she throws up her food within about half and hour of meal time, or after a drink of water. This morning, before breakfast, we gave her a drink of water (usual routine), and she threw all of it up followed by throwing up yellow bile. Sometimes we can look back at how she was acting before we fed her (in retrospect) and remember that she wasn't actually acting her usual hungry self and wasn't eating as voraciously as usual. She does eat a lot of grass and dirt outside, although we try to stop her (part cow?). I don't know if that is causing the problem, or if she is eating grass because her tummy is upset??? Sorry if I'm rambling, but after searching the internet for answers, I find that all I have is more questions :? . Thanks in advance to anyone who might have some suggestions.