I just installed the mod and I thought maybe I could turn my vanilla dogs into sophisticated wolves by feeding them a treat (feature request btw), which I apparently wasn't supposed to do.

Edit: I just read the description and I guess I was correct in the assumption that feeding a treat to a vanilla dog would convert it, it just didn't work as intended.

Edit 2: It continued to crash every time I logged on until I deleted the dog with MCEdit. RIP Roofael.

http://pastebin.com/844XbSLG