Board Thread:Dragon City Questions and Answers/@comment-7515235-20130328193249/@comment-1187731-20130404055008

I get 15 Bones (UFOs) after 3 days just by harvest 5 minutes Food. :)

http://i.imgur.com/kHtapyR.png

But it's really hard to get the Teeths (Baby Alien), so far I just got one of it by breed Petroleum and Pirate (all result are Pirate-15 hours, Petroleum-16 hours, one Mirror, and one Wind). >.<