That's a bug. I don't actually get bugs, well most of the time, so i don't really know.
I saw two wolves just before I went to school today. But I had no bones.
You still need to learn a lot, especially about mobs, either passive, allied, neutral or aggressive mobs despawning.
Magenta is old, You could use it from when Dyes and Dyed Wool since 1.3? or is it 1.4?