There are three types of dragons eggs:
Orange Egg - Neutral Dragons:
Cost $150,000 (Level 50 or above). Eggs sell for $70,000 each.
Hatches into a Crystal, Yellow Jade, Purple Jade, Blue Treasure, Crystal Jade or White Dragon.
Brown Egg - Evil Dragons:
Cost $200,000 (Level 55 or above). Eggs sell for $110,000 each.
Hatch into Green, Blue, Red, or Black Dragon
Blue Egg - Upright Dragons:
Cost 1,000 Papayas (Level 60 or above). Eggs sell for $150,000 each.
Hatch into Brass, Bronze, Gold or Silver Dragon.
Dragons can attack each other or other farm animals. When they mature, you can send them to attack a friend’s ranch. If the ranch does not have any dragons guarding it there is the possibility that you will get some money.
Added by: Sanzano Jul 13th 2012, ID#260