Our dog was recently hit by a car while outside. Since then he refuses to go out and will use the bathroom all over the house. We have tried to lure him outside with meat and other treats but to no avail. I know he is scared but he has to go out! It is also strange because for the next three days or so after he was hit by the car, he went outside like nothing ever happened. But ever since then, he will not go out. What do we do??!!