No baby horses/foals)

So, recently in my singleplayer world, after the new 1.8 update, I have noticed that there are no baby horses. I have bred horses, and adults have come out, I have spawned and not 1 baby horse has spawned. Yet sometimes, when I kill a horse I can hear the squeal that you would normally hear when you killed a baby horse. I would like this bug to be fixed as soon as possible, thank you.