I stayed calm and I didn't yank and pull on her head (she is quite head shy due to being abused in the past) I asked her to back across the arena. Then asked her forward again, but I stopped her before the threshold and backed her again. I repeated this for a good 5 min. I tried to do it Monty Roberts style. (If anyone has ever watched him teach a horse to load, this is how he does it). I got her to step through the entrance and was super pumped....until she planted her feet and backed right back in. =(
I ended up backing her out of the arena. Because well....tug of war with a 900lb creature just is not a good time.
I know she is testing me and trying to do a mare-ish dominance fit, but I was wondering what else I could do to stop her from pulling this trick on a daily basis.
Thanks in advance for your help!