Better Mob

So, I first just was really bored so I decided to make a texture pack just for fun. Since my paint didn't support transparency, so I just decided to only do mobs, because they barely ever need transparency. Mods are very compicated for me, so I'm just making a texture pack. Once I finished with some mobs, I figured out that the skeleton needed transparency, so I just skipped it. I figured that if I just naturally skipped it, it would still be transparent. For the record, I have no idea why zomies' heads are white. And I swear sheep had faces!