When we were big into sims, we had calves with swollen heads like the first pictures, when i saw the picture i thought 'that calf did not move around good at first'. My job was much harder and we lost more calves and cows. Occasionally we'll get a throwback big calf, but not like we use to when we had sim bulls. Our angus and angus mix calves hit the ground standing. They average 60 pounds and wean out at average of 700.
Explain the string, you're calling it a graft. A graft of what? I usually graft a couple calves a year but i use hobbles. I'm going to guess that your cow is more a pet? and easier to graft than something nonpet. But i'm interested in the string grafting, love to hear more about it...