Egg hatched for no reason

I feel pretty cheated. I already own all yaks. I got an email which said my egg hatched so I thought there are new avatars to collect. Now I lost my egg for no reason. Even tho I own another egg code which I used now I´m super pissed because I wanted to collect eggs for the future. Is there a way to get an code for the egg I lost ?

Hi Vetrix, take a look here please