Elsa hack

I tacked her up and went on a hack with Kristen, working on them being together and separating, which Elsa has no trouble with, but Sif does.  With Elsa, we worked on halting and ratability and she was quite good.  We went down the road to the end, then around the prairie.  Afterwards, I grazed her for 20 minutes while Kristen tacked Moondancer.