The cracked egg is a common egg in adopt me which will be obtainable forever. You can purchase it from Doug in the nursery for 350 amc. There are a range of different pets in which you can get from this egg with a 45% chance of hatching a common, 33% of a uncommon, 14.5% of a rare, 6% of an ultra-rare and a 1.5% chance of hatching a legendary unicorn or dragon. As well as that, on your 30th day login streak you will receive a cracked egg. Its appearance is a brown egg, with a crack in the top and an orange yolk.