One can not really restart Dragon City on Facebook. The only real way to restart this game is to start a new Facebook. One may be able to delete things and what not, but it wont ever restart the whole game.
You Can't restart the game... Hope I Helped...
delete it on facebook & wait 60 days
gummy dragon....................
Fire And Metal
dragon city
electric dragon and earth dragon
Breed Ice and Water Dragon :)
press alt+p
it helps the dragon to have more level and the dragon will be more powerful
12 hours :D long but worth it
Breed icecube+hotmetal=cool fire