When the rain let up, I went outside and talked to them. They pricked their ears and listened......"why aren't you in the barn? We built this for you so you could have shelter from the rain. Silly horses, get in the barn!" And I went on with my one sided conversation while they were probably thinking Mommy has lost her mind. I walked our property and went back in the house. We looked out the window and the horses were in the barn. 
No Red it didn't, I didn't feed them until later in the day. Then I did move their feed tubs into the barn and that messed them all up. They had to run through the barn, kicking and bucking, whirling around and making general idiots of themselves. I think they were having a "moving in" celebration.
May I give you some preventative advise ? I would get 4 x 10 or better yet, larger and pressure treated timbers to set at the bottom of the tin as well as set the timbers below gound by a few inches. Reason being that horses have a bad habbit of laying down near the wall and sometimes they roll over and get their legs / hooves protruding under the wall. Tin then makes a NASTY CUT on the pastern, leg or corronet which then makes the Vet. a lot of money.
