Found this at
HowStuffWorks "How to Give First Aid to Your Dog: Tips and Guidelines"
Not sure what a vet could do. Maybe antibiotics?
Dog's Bleeding Ear
Step 1: Restrain the dog if necessary.
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Step 2
Step 1a: Approach the dog slowly, speaking in a reassuring tone of voice.
Step 1b: Muzzle the dog to protect yourself.
Step 2: Cover the wound with a clean cloth, sterile dressing, or sanitary napkin. Place dressing material on both sides of the ear flap, then fold it over the top of the dog's head and hold firmly to control bleeding.
Step 3: Wrap torn sheets or rags around the dressing, ear, and head, making sure the entire ear is covered. Tape or tie the bandage in place.
Step 4: Transport the dog immediately to the veterinarian.