scheint ein bekannter bug zu sein, eine offizielle lösungs gibt es nicht. in einem der wikis ist beschrieben das nach 3 oder mehr tagen nicht spielen der tote drachen weg war
[....I actually just turned on the game after not playing it for about 3 days and the dragon had disappeared. I just hope it doesn't come back. I'm lucky enough to not have had any other glitches than this minor one. Thanks for your help though. :) — Unsigned comment by 65.188.36.233 (talk) at 16:05 on 12 January 2013
Glad it worked out for you. Since you're on a console version, using the dev console to remove it isn't an option for you. However, in the future should something similar happen again you can usually stop it by going away for at least 10 days, which will cause the cell to reset. Just go someplace else, use the wait command for 10 complete days, and travel back. It should be gone then. Quillan (talk) 17:38, 12 January 2013 (GMT)...]
http://www.uesp.net/wiki/Skyrim_talk:Hearthfire#Dragon_not_leaving_the_front_of_my_house.