MINECRAFT: Mobs Appear Like a Black Shadow?

Every time I've started 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; however, I've confirmed this is not the problem since I have turned them both off for pure Vanilla MC and the issue still occurs.

The mobs aren't always completely black, I have to relaunch a few time to fix the issue, but this is tedious and not fun.

Anyone know a fix to this?
Thanks!

EMPHASIS: The packs are not the problems.

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.

Well, if its PC then Uninstall Minecraft and reinstall. If that doesn't work It may be the Version that you are on, try going into 1.7.9 and then back to 1.8.4 Also try not using the snapshots until all bugs are proven solved.