Hi, My rabbit Snowy gets a runny nose when I take him out in the car he gets really stressed out.
I took him to the vet because I thought he had something wrong with him but the vet said as long as the runny nose isn't a white stoggy colour he is fine. Does your bunny have clear eyes no discharge and is his teeth ok, sometimes the nose runs because of teeth problems but if the runny substance is clear he will be fine.