We have just built a trailer for our family cow. The walls are about 46" tall. I read that her lead should be long enough for her to lie down. When I've transported her in horse trailers she hasn't had a lead that long. I will not be bringing her on long trips. 90% of the time it will be 1/2 hour trips. The longest trip I ever expect to bring her on (once a year) will be a 3 hour trip. Right now she is a 39" tall calf. Do I put the hitching ring more at nose level or lower so she can still lay down with a shorter lead? Thanks for the wealth of information that exists for someone like me on this site.