The twelve rods of a blaze cannot be independently retextured

(Issue first appeared in Beta 1.9 Pre-release 1, when the blaze and it's texture were first added)
The 12 rods of a blaze cannot be independently retextured, resulting in them always looking the same. This is limiting to a player's creativity and ability to modify the entity's texture.

Steps to Reproduce:

1. Download and apply the provided resource pack:
   

1. Spawn a blaze

2. (Optional) Disable particles

Observed Behavior:

All twelve of the blaze's rods will look entirely red, despite the player seemingly only modifying one rod in the UV map.

Expected Result:

Only one of the blaze's rods would be altered, since that is what the player intended to change. The current behavior is unexpected and not resource pack friendly.

Screenshots/Videos: