This really breaks my heart. I remember being at a vegan camp, somewhere in the middle of nowhere many years ago and hearing this for the first time. We were in a valley and the screams of one cow just bellowed and bellowed. I asked one of my friends what was up and he said that they'd taken her baby away. It was so traumatic, I was horrified... it lasted a long time.
I've witnessed the same, time and time again in the countryside around here where I live and feel so powerless. Recently I passed a calf crying out in one field, communicating with his mother in a field across the road. Even though I've not eaten animal products for 20 years and do whatever I can to help put the word out, I felt so powerless. Those screams rang in my head for days! All I could think was how removed people are from the sentient nature of all animals!