I tamed a couple of dogs and bred them, then they could no longer stand up. I had many attempts over many different days, but nothing i did worked. They would not stand or follow me, and there were no other dogs spawning in, so i had to kill them, then found some more later, brought them home, and after getting one more puppy from them, they all stopped wanting to do anything. One of them was not used for breeding, but still bugged out.