I have two things to say:
1st: I honestly prefere the old lead that wouldn´t break, because the vanilla one is really fragille and it´s impossible to bring horses up to the 150 layer
2nd: when you put down a kitty bed, it will crash the game and you will never be able to open the map again.
Note: Im playing on Minecraft 1.7.2, Mo Creatures 6.2.0