Did you see that bit in the clip where Faith drinks out of her water bowl? She squats down a little on her hind legs, then arches her body so that she can get her tongue in the bowl. From this I surmise that she can squat enough to eliminate: many dogs, especially females, squat to urinate, though Faith won’t be able to acheive quite this posture.
That’s a generalization that’s pretty hard to back up. Case in point, my friend who just died at 85. When he was a boy an accident destroyed his pelvic socket. He was told he’d never walk again. Over a period of months, at first only when his family was out of the house, he got himself out of bed and fought to walk again. At first, he couldn’t even put full weight on the bad hip due to the excruciating pain. He forced himself through the pain over a period of months to increase the time he could stand, then to walk longer and longer. Later xrays and medical examination showed that he had ground a new hip socket. He ended up with one leg much shorter than the other, but he served on a ship’s engineering crew in the merchant marine during most of WWII and became an excellent golfer.
According to Faith’s owner in the video, she would not have learned to walk without the training program and support of the owner.