Wyatt Earp speaking of Doc Holliday. Doc Holliday's father, Henry B. Holliday was a trained pharmacist who served in several wars, including the Cherokee Indian War, the Mexican War, and as a Major in the Confederate Army.
Dogs frequently eat grass to ease stomach discomfort. If your dog's stomach is empty, the grass may cause your dog's stomach to produce more digestive enzymes, and this can result in vomiting bile. Unless your grass is treated with fertilizer or pesticides, it's generally safe to allow your dog to continue eating it, as it can help ease her stomach problems.
Loss of appetite and vomiting white foam/bile. This morning when I got up to go and take the dogs out I noticed that one of my dogs had been sick near his bed. He had eaten the previous day but had since had walks and pooed etc. The vomit consisted of a bile/white foamy type substance- no actual food. I noticed in one bit that there was a minute bit that was slightly more congealed (like a small bubble) which had one tiny (I really small) red speck in it. I examined it and I do not believe it was blood but worth mentioning.