In survival and creative. wolves can be spawned but not tamed. will still get hearts above their heads when fed, but collars do not appear and they do not get tamed. Seeing as ive built a large city for wolves this is really screwing up my game plan. hopefully you can sort this out soon!
MC-73278
Unable to Tame Wolves
Resolved
Cannot Reproduce
0
Cannot confirm.
http://gfycat.com/IdealInconsequentialAfricanwildcat
If you're playing mutltiplayer, it might be a modded server.