He looks just like the one we had this spring. Big calf, thought we hit the jackpot, legs were not straight, he just had a stout, sharp look to him. At 3 weeks of age, he was laying around all the time and started standing like your photo. He could still walk around the pasture without much trouble. As he went downhill with time, he could actually run halfway decent, but walking was a chore. It kept getting worse to the point he had trouble standing because his back legs would go all over the place. He had trouble laying down because he couldn't get his back legs to quit twitching. There was no bend to his back legs when he stood up. When he laid down, he could bend his legs. At almost 3 months age, he caught pneumonia or something and died. Should have put him down before, but he was always alert, was otherwise healthy, was growing, tried really hard and had a big will to live.