I agree with the suggestions to scent the pee pad - wipe up a little pee with it and pick up a piece of poop with it. It sounds gross, I know, but it shows her what they're for. She hadn't been exposed to pee pads prior to coming to you, had she?
I'm no expert but I've read that it's easiest to housebreak a dog using only one method. In other words, you might have success faster if you pick one method - pee pads or outside - and only try to train it.
Adult dogs who've never been housebroken definitely take longer. Hang in there! You are doing great! |