Lame Heifer

[Kailee TheKool]

Hi guys. My friend's heifer recently escaped the pen and ended up running six miles before we were able to catch her. We know she ran over piles of wood, rocks, roads, and rough land, and possibly piles of metal too. Yesterday we noticed she wouldn't put weight on her left hind foot when standing, but when she walked she took perfectly normal strides. Has anyone ever seen this before? And does anyone have any ideas why she's lame and how to treat it? Thanks!

P.S. We will be contacting the vet soon if she doesn't improve, we just wanted to get an idea of what the problem might be and how to start treating it first.