My Moms Dog Needs Your Help

King Arthur

Barked: Thu Jun 17, '10 11:30pm PST 
My moms dog is a un-fixed male Great Dane and is 7years old and is bleeding from his penis we are taking him to the vet tomorrow but I just want to find out what it could be to help my mom calm down some anything you can think of would be great thanks so much.
Odin, SDIT

Barked: Wed Jun 30, '10 6:31am PST 
What ended up to be the cause?