The Horses get stuck in hay blocks and sufficate.But horses that are tamed dont get stuck
I thought that they wouldnt get stuck.
They are walking then hit the hay block and start sufficating.
1.Spawn about 15 horses.
2.Then put down hay blocks stacked 1 high and some stacked 2 blocks high.
3.Then just wait and youll see horse start getting stuck.
I beleive this may be a duplicate post of MC-13632