My dog is vomiting and has diarrhea, throws up everything within minutes, and has bloody stool; might be coccidia. Given smectite, Yunnan Baiyao, omeprazole, then coccidia meds; now energetic.

The dog’s symptoms may be acute hemorrhagic gastroenteritis from indigestion, food poisoning, parasite infection, or bacterial or viral infection. If the dog is unvaccinated, go to a pet hospital promptly for a virus screen. If it has had three shots and annual boosters, viral infection is basically ruled out and you can keep observing for two days on the current medication.

In addition, when vomiting is frequent, withhold food and water for six hours, then give medicine only after vomiting stops, otherwise the drugs may stimulate more vomiting and fail to work.