My Poor Sable

Sable is usually on my left side so I rub the left side of her head and ear.  So when she happened to be on my right side last night I was shocked to find her ear was all scabbed over and oozing.  I wasn't grossed out as you are now.  I grabbed her colar and pulled her around and asked my Dad to bring the flashlight.  I was wondering if this was damage done by the dog confrontation she got in over a week ago at the park.  I cleaned her ear with witch hazel and then her ear wash before I applied some of her medicine for ear infection.  I hope it gets better soon or we will be going to the vet again.
What do you think?  I can't really see any tears or broken skin.  Hard to believe all of this is from an ear infection.