Lame Horse

I went down Wednesday for my lesson and i got on, and at the trot he would bob his head (which is a sign of lameness) and he wouldnt trot when i asked, which is sooooo not normal. His beat also felt very off. We went down today (Sunday) and i got on, i knew something wasnt right. When i asked him to trot he wouldn't and when he did it was off and he would lurch off his front right and the head bobbing was worse. That hoof has a crack in it which is what we thought caused it on wed. He also tripped alot :( So i got off, we called Sandi and told her. When i took him in the cross ties, i looked i his legs and was like OMG his right is soooooo swelled (from the pastern down to the top of the hoof), it was like double the size of his left. Poor Sky! We are having the vet in to look at it. My buddy will probably be on stall rest for like 2-4 weeks. Ohh well we will still have fun!!!