I'm about to adopt a 19-year-old Hanoverian mare from a local rescue. She's extremely well-schooled; she used to compete in dressage. However, she's not been ridden in 2 months (not counting the 3x I've ridden her over the past 10 days). She's become really buddy sour. If I walk, trot, or even canter her past the paddock where her buddy's held, she screeches to a halt and refuses to move for 20-30 minutes. I will be moving her off farm in about a month and we need to deal with this problem now, before she's half an hour away from her pal.
Additionally, she paces back and forth on the crossties when she's being tacked up. This is more of an annoyance than anything. How do I train it out of her?