Just put this on my Server, everything works fine, but it said the Wolf was supposed to spawn within 10 blocks... it was 650m away. And the Wolf WILL NOT follow me outside the POI I found it at. It will folllow me perfectly inside, but once I get to the barrier it just stays there.
EDIT: It actually seems to be that the wolf just doesn't move if there are enemies around.
I guess the reason the Wolf follows us (the player) is because it sees us as an enemy but doesn't attack, and when enemies are around, it attacks them instead of following the player.
I could be wrong but thats what I feel.