Dog with raw ear

My dog's ear is very raw. I noticed it was very red but wasn't sure why.
I haven't taken her to the vet yet.

Today I came home and she had been rubbing the side of her head (ear) on the carpet. I guess it was itchy. So it was very raw and had a lot of dark build up from where moisture had dried up and parts were wet. It wasn't puss but you know how when skin gets raw, it's wet...

I cleaned it with Colloidal Silver and rubbed peroxide and oil of oregano on it. It looks better than it did when I came home 5 hours ago, but still red and raw looking and a little wet again.

Any thoughts? Her ear also smells bad and I think this may be why she has lately been digressing and pulling things off of the kitchen counter and chewing up or eating things she shouldn't be. Dogs do that when they're experiencing discomfort, right?