What should you do if your guest is really sick?

It all depends on what you constitute as your guest. If you are talking about a pet that you may be house-sitting or a pet that you may have, then be sure to call the veterinarian or the emergency line at your local vet's office. If however, it is a human patient, or person that is sick, then you will need to call 911 or visit your local emergency room if necessary to help the person. Depending on the severity of the illness or injury, it is possible for the patient to go into a walk in clinic as well, but if the problem is serious, then you will need to go to your local emergency room.