MINECRAFT: Mobs Are Black?

Every time I start up Minecraft today, mobs have appeared completely black to me, absolutely no color.

I should state that I'm using a resource pack and shader pack.

The mobs aren't always completely black, but it's not fun to have to constantly relaunch the game hoping it will work next try.

Anyone know a fix to this?
Thanks!

Added (1). I don't think the packs are the problem.

Added (2). I've turned off both packs and played Vanilla MC, the problem still occurs. All mobs, creatures, etc., even treasure chests, are pure black.
I repeat: the packs are not the issue.

Try disabling the mods/packs and see if the problem disappears.
If it does, the cause lies with packs.
Try: Getting Optifine or any other patcher if you're using a HD resource pack.
Check around and see if the two (or more) of your packs are incompatible.