Q. I think my Daschaund may have taken 400 mg of doxycycline. Should I be concerned
A. You will likely see GI upset, possibly severe. If you observe vomiting or diarrhea, withhold food for 12-24 hours. Allow small amounts of water or unflavored PediaLyte. Resume feeding a bland diet (1:1 ratio of plain boiled boneless chicken and plain white rice). Feed in small, frequent amounts waiting at least one hour between feedings. If the vomiting stops, continue feeding until the stool is normal. Transition slowly to the regular diet. If the vomiting or diarrhea donâ€™t stop, see your veterinarian.