They had been coded, kinda. Tinker's Construct mod used to have Slime Boots but it now allows you to craft bouncy boots. Carry On is another mod that lets you pick up not just cats but every passive mob (hostiles can be picked too but needs to be changed in the config).
5:49 Steve: mh... Mmmhhh aahh, why it is so difficult to breat- Neil Armstrong:ONE SMALL STEP FOR A MAN, ONE GIANT LEAP FOR MANKIND Steve: WAIT AM I ON DA MOON???!!!
