Tristan fell lastnight and hit his head on the concrete floor in my on laws garage. After crying for a few minutes he was fine and running around like normal so I thought everything was fine. This morning he want acting himself.not as active out vocal as he normally is. We decided out would be best to take him in after talking with the on call nurse we found out he has a mild concussion. I fell bad that I let it go so king but the doctor said sometimes head injuries don't show symptoms for days. Poor baby!