The wolf texture, under the head, is combined, with a lot of little grey, white and black squares and triangles.
To see this issue, you have to look up from under the wolf's head.
The issue is known, however I didn't found it here, but it could be duplicated.
Environment
Windows 7, Java Version 1.8.0_151
Hey there!
Does MC-13103 happen to describe your issue? I think the thing you are trying to explain here is the fact that the snout is z-fighting with the head.