The Starter Egg is a free egg that is given to you when you enter Adopt Me for the first time. It will only hatch into a Dog or Cat. You cannot obtain it anywhere else in the game and it is non-tradeable. You can only get one of these. You have to hatch this egg to be able to start playing the game, unless you make your money by being a baby and taking care of yourself. It is the first egg that has a 100% chance of hatching into a common pet, with the second one being an Easter 2020 Egg.