This has happened to me before. Its terrible to witness. Olivia is when olivia was 2 1/2 we got another puppy. Olivia is spayed, anyway, she would all of the sudden lunge at the pup (izzy) when she walked by and bit her ear and made it bleed. Might be a dominance thing. when izzy got older they got in another fight that olivia provoked, izzy is much bigger now and she bit olivia in the nose and made her bleed. They worked it out themselves, izzy is now dominant olivia is not. Sorry your fight went further as to cause multiple injuries. they will get over it. once one gives up his or her dominance.