Those are called hot spots and they are caused by constant licking and it is baisically a habit that your dog has gotten into and just to be shure you should go to her vet and get some cream for it so she doesn't like the taste and stops the licking and the sores don't get bigger
hope my answers help you out let me know how it goes golden19287@yahoo.com ok talk to you later
I took my dog in for the same thing about 2 months ago and my vet told me to get cortizone cream from your local store and smear that on their sore twice a day. This worked and it saved me a lot of money! Vet's are spend now days!!