Im on level 11 and I bought a curly tuckle from the egg shop and maybe about a day or so later, the egg had a blue '!' over it, so I started incubating it, and Once it was an adult I mated it and made another egg, And the egg had a '!' over it! So I tried mating the monster again and the next egg had a '!' over it! Why is this I need to know ASAP. Thanks.