Shooting conditions: About 45 minutes before sunset with animals about 100-150 yards away. Bull was constantly on the move herding his cows and chasing off young males.
My setup: On a good tripod with ball head not locked down. 100-400mm lens with IS mode 2 engaged since the head was not locked.
My mistakes:
1) Shot at 7.1 aperture and should have been at wide open 5.6. (If you don't have the experience to know how deep your DOF is, use the DOF calculator!! I think I know stuff when I don't. )
2) I underexposed almost all my shots and I know with higher ISO's I should be exposing to the right. Most had to come up in PP by around 1 stop and there is noise in the shadow areas. (If you don't have all this stuff down, think of potential issues ahead of time and make a checklist. Oh, and then get it out of the bag and read it. )
#1 Upped exposure 1 stop. Very slight crop on this to remove some grass
#2 Upped exposure 1 stop. About 15% crop on right side to remove cow with tag collar
#3 Upped exposure .9 stop. Small ratio change crop to remove partial cows on right