Quote Originally Posted by wolf_Q
Most dogs prefer to only go on surfaces that will absorb, like grass. My dogs only go on a concrete surface if they really have to go and no grass is nearby. I have never taught them this, it is natural for them to prefer that.

Ditto.

Although, when I first adopted Kiara and Nala they would poop on the cement (just poop, not pee) I imagine they were used to doing this on the cement at the shelter.