They love sweet feed. It also helps give a little more weight. It looks like she could use some. Also a couple tablespoons of apple cider vinegar in a gallon of water, helps with worms. Free choice baking soda helps with acid in their rumen to keep away bloat especially with fresh spring pasture and grass. They will eat it if they need it. Somehow they know. Now for making her more gentle. Hold some sweet feed or whole corn in your hand or bowl. Sit on a block or something near her. Throw out a piece or two at a time until she comes over for more. When she gets close enough and starts eating the food reach out and scratch her under her neck, down the side of her neck, and above, just behind her front legs. They love that. Do this once or twice a days for 10 minutes. After a while she will come running to you.
