Try pulling her head to her side and circling her around once to see how she does and if that doesn’t calm her down then repeat it several time’s, till she does. Then when she is calm let het stand for a min. praising her and stroking her neck. Then repeat the command gently till she abbeys. Repeat several time till you are sure she understands. This usually work’s very well. I have used this method a lot training horses in the past. By pulling her head around takes away her ability to buck, bolt, or spoke, as well as running away with you. Good Luck.