Friend, it is common when dogs are having gastrointestinal issues to eat grass.Vomiting can be caused by many different medical conditions. It will be difficult for me to determine the exact underlying cause without a hands on examination and some testing. But, common causes are: A simple gastritis, dietary indiscretion, ingestion of a foreign body, infections, etc. to name a few causes. The fact that she ate a rib bone 2 days ago I would really want to rule out the bone being obstructed. For this reason I would strongly recommend having her checked today by a veterinarian for xrays. You see, if this is related to the bone and it perforates the intestinal tract, the outcome is likely fatal. For this reason it is best to not wait. In the meantime, in any case of vomiting the first thing to do is give the stomach
time to rest. This is what you can do:1- Do not give things like Pepto Bismol or imodium. Start her on Pepcid AC (famotidine
) 10mg tablet every 12 hours. You can buy Pepcid AC over the counter in any pharmacy.2- No food or water for 6-8 hours. Need to give her gastrointestinal tract time to rest. 3- After 6-8 hours offer a small amount of water. Wait half hour, if no vomiting, offer small amount of rice (50%) and boiled boneless chicken
or ground beef (50%) 4-6 times a day. 4- Follow up with your family veterinarian for a hands on examination and xrays as soon as you can. If cost is a concern look into your local ASPCA or Shelter where they often offer veterinary services at a lower cost. My goal is to provide you with excellent service - I hope I've provided the information you were seeking, if you feel you have received anything less, please reply back as I am happy to address follow-up questions. Kindly rate me when you are done.