I have been calving on pasture for the first time this year and have been struggling with my cows leaving their calves. They mother up no problem but then when the calf wants to sleep, it just lays in the grass and momma goes grazing with the herd. The calves sleep most of the day for the first week of their life so they are constantly being left alone at random spots while the herd goes grazing. My grass is taller than the calves and sometimes the herd gets hundreds of yards away. It just seems like these moms are really taking their chances with losing a calf. Or maybe im just used to them being in a lot for the first month of their life, and paranoid.