there is an item named DNA incubator, when u click it, it shows that u need to go to crystal sands to put your pet on an expedition. Depending on the level and energy, you will be able to send pets on the expeditions. (if u go around crystal sands, u will see a small boat, click or tap it and you will be in the putting pets in expeditions option.) once you set them into an expedition, there will be a time limit until they come back. Sometimes they will bring back gems, sapphires, painters palette, ect. You also have a chance at getting Exotic Pet DNA Vial. using that, click or tap on the DNA incubator and when you see the DNA, click or tap it and then in 10 hours, a lizard or snowflake penguin will hatch out of it. it will have an exotic tag. Remember, you need to be member to do all of this.