Thank you all for your care and thoughtful suggestions. When he was vomitting the yellow, foamy bile, we decided it was an empty tummy and gave him some Pepto. An hour or so later, we gave him some "holistic" food (I think it was Nutro Ultra) and he loved it. I thought we were doing good until he wouldn't eat this morning. I don't know if the new food upset his intestines. I'm going to keep trying.
Does anyone have any experience in making home made dog food? If you do and you have a good recipe, would you mind sharing?
thank you!