Thank you all for your advice. Both my boss and I absolutely hate to see Brandy hurting babies. But he is extremely attached to her, so I don't see him getting rid of her. She is his only companion besides the cows and me (when I'm working). Brandy replaced his last dog Sheba who died couple years ago due to old age, losing Sheba was hard on him. And after many months, when he asked me to find him a puppy, I brought brandy to him and he fell in love with her. So its kind of a difficult situation. Hence why I asked for advice on what can be done to stop Brandy besides a bullet...
Brandy is a great dog besides this. She is obedient (knows come, sit, lie down, stay etc), she's super friendly, doesnt bark at a cars or strangers, doesnt run- she stays home or stays with us when we are working, she doesnt chase cows unless we tell her to (even then, getting kicked in the face a couple times she is hesitant to do it), she is great with all our barn cats (kittens too), great with other dogs (big or small) and she is good with my horses when she comes over.
The ONLY time she has shown aggressive behavior is with the neighbors giant St. Benard who has a long history of coming onto our farm and MAULING our last dog almost to death, repeatedly, and who had also attacked my horse and I when we were riding on my boss's property, and so when he charges onto our property, barking and snarling, coming to attack Brandy, she stands up for herself- something he never had happen to him, and drives him back into his yard, where then she leaves him alone and comes back to our side of the property.
And she is GOOD with calves. Just these two calves we have has a problem with her, one from a year ago, and one recent one. We have had 30 some babies between/after these and not once has she shown any interest or tried to nibble on any of these.
The thing is when I have caught her "chewing" on the babies, she was licking on them like she was cleaning their wounds... only she was making it worse. This last calf came into the barn covered in placenta slime... and the mother and other cows refused to clean it. My guess is she was cleaning him up and got carried away. She doesnt attack them or gnaw on them, she licks and nibbles.
With this recent baby, the bandage could have slipped down on its own given that the elbow is a hard place to bandage and the calf liked to thrash around. Not that I am defending Brandy, I throttled her a good one when I saw her. We removed the calf to my house and he is doing really well, no sign of infection, wound is healing, his hind leg is getting stronger, and he has one hell of an appetite. Since then we have had 2 other babies born and she has not gone near them.
We are keeping closer tabs on her and are going to invest in a stronger shock collar since the last one was not a very good one, basically was just a tickle instead of an actual shock. Its just difficult because, she is not a vicious or mean dog, I don't even think she realizes she's hurting the babies. It would be one thing if she was attacking and mauling babies to kill them and doing it for fun but she isnt, and trust me if it were the case then she would have gotten the bullet a long time ago. Its just not an easy situation right now.