TIme for the Vet, that looks like a prolapse. While it may go back in by itself, if something goes wrong and something twists inside, it could be very life threatening. especially if there are children inside you really don't want to take any chances. If the trip to the vet is going to be a big hassle, with loading / unloading bla, print that picture and / or e mail a vet and they may be able to tell you what to do, can do, perscribe something over the phone etc etc.
Its worth a try if you can do that w/o a goatie road trip.
Aaron