Wolves have hostile skin in Creative when chasing mob and killed

Wolves chase Skeletons and Sheep, but when one is in Creative, and then one hits the Wolf, their skin becomes the hostile version and they emit hostile noises.

I do not know whether it should turn hostile or should stay the same, but regardless, this still needs to be fixed (albeit not too soon, I do not doubt!).
Steps to reproduce:
1). Spawn a Wolf in Creative.
2). Spawn a Skeleton nearby.
3). Slap the Wolf when it chases the Skeleton.
4). It will change to hostile appearance, and emit hostile noises.