It's always hard to feed cattle on pasture this time of year. Why? Because it's such a variable season! Each day, each weather change, and each paddock is different. So he's always trying to guess how much grass they're getting.
Heifers - He wants to make sure the heifers are getting enough grass, because that's what they're eating. He checks their condition and their pastures a lot.
Cows - He feeds the cows supplemental feed. After he feeds them he checks the bunks. If you feed them too much, there's food left in the bunk. You don't want to pile feed on top of it - you want them to eat what was put there originally. But you don't want their eating schedule to be off. He also checks the milk production numbers.
So, grass quality, feed quantity, and a nice break from it all for a few hours on a perfect football Saturday.