You are over thinking it with Bessie and the 3 calves. She looks good, go back and look at her picture at the beginning of this thread. The calves will not get roly poly fat like a single beef calf, but they look good and if they are starting to eat some feed then they will be fine. I think you ought to keep her heifer, and when you breed her, (AI to a jersey of course) ..... she might well be able to raise 2 calves with the jersey in her background. If I had my knees done already, I would have 7 nurse cows in the barn with calves on all of them. But they are on the dairy and a couple are already bred back.... to calve again this fall right about the time I am getting the knees replaced. So they will stay there for another lactation... which is fine. I am lucky that I have contacts with the dairy farmers so getting calves is not a problem. Knees get done and I get back to a real life.... then I will get them back from the dairy as they go dry the next time....
I think that you might have gotten bertha to be more accepting, but it could have taken time to learn to tolerate the calf better. But then she might have hurt it too....
FACE IT, BESSIE MAE has spoiled you. I thought maybe she would be a good cow when you bought her.... never dreamed she would be this good..... count your blessings.....