I can only speak from my personal experience but this isn't the easiest breed to housebreak. Only one of my 3 will paw at the door and even she isn't consistent. It's not that they are trained, it's that I am trained to let them out every few hours. If I don't, they go in my laundry room. If it's raining and I put them out, they won't leave my patio unless I stand outside with them (in the rain).
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