Sgabb928, I had a Yorkie (deceased now) that would drink water way too fast and throw it up shortly after. It was clear, maybe a bit foamy at times. It didn't seem to bother her. I don't think she gagged on it, she just drank too much for her little stomach way too fast.
I would be concerned at the color of the vomit. Any off colors (dark brown, yellowish) may be a concern.
If he keeps doing it, see if there are chunks in the vomit. I know it sounds gross, but if he is getting into things he shouldn't be (scraps dropped on the floor etc) it could be an indication that his body is rejecting what he got into. Clear vomit never concerned me, but when there is foam I look into it a little more.
In my experience, when my 9 year old vomits foam, she got into something and I am usually right. She is rejecting the crap she ate. It may be the medication. Time will tell. If he stops vomiting soon it may be possible he had a bit of a problem with it.
Also, we have a puppy too and she is taken outside ever 3-4 hours for walks and fed at the same time so she eats several times a day. I think it is difficult to expect them to eat often as their attention span is so short and they are so excited and just forget to eat, but we spend time with her every time we try feed her to make sure she at least eats some kibbles.
Watch out for hypoglycemia, too! If she isn't holding weight and putting it on, she could go hypo. Not every dog will go hypo but it is a possibility with these small dogs and if they are not eating it could trigger a reaction that is not pleasant to see.
Good luck and enjoy your little guy! You sould like a great owner and your puppy is lucky!
