There are 3 different types of eggs:
Standard eggs can be found in-game (up to one per game). After some incubation time they will reward you pets for your dragons.
Premium Eggs can only be purchased but they are instantly opened!
Golden Eggs are the only way to unlock Special Pets and you can obtain them when you have collected enough Golden Egg fragments. Additionally there are also special eggs that you will get in some tournaments or quests or through special offers.
Standard eggs can be found in-game (up to one per game). After some incubation time they will reward you pets for your dragons.
Premium Eggs can only be purchased but they are instantly opened!
Golden Eggs are the only way to unlock Special Pets and you can obtain them when you have collected enough Golden Egg fragments. Additionally there are also special eggs that you will get in some tournaments or quests or through special offers.