You ain't seen me....

Friends are in Colorado spending 6 months in their RV wandering around the State parks. Chris was fishing, leaving Shena to have some time to read alone in peace. That was until she became aware of heavy chomping noises and crashing in the bushes next to the RV. In fear of her life she closed her eyes, all went quiet. When she opened them she was being stared at by a large black cow, number 890.