It's impossible to put a mane on the wolf model. That's just the way the model was built.
To make a canine character with a mane, you can use either the Skinny Body, Fat Body, or Original Body and just put a canine head on that, then put a mane on it.
(http://i1122.photobucket.com/albums/l527/justarandomperson1/last_moon11092013_002111266_zps541bdc7e.png)
^Like so. I used the Original Body for this example.