Well, the chick grew up into a chicken, but you’re still not sure how the egg got into that cave...

She may have a silly name, but Madame Mini-Dragon really doesn't understand that she is a different species of creature.  She believes that she is simply a smaller breed of dragon, like the mint dragons.  She gets quite confused and a bit cranky when the other dragons try to make her a pet.  They mostly are amused by her belief and leave her alone, except for the mint dragon who is relentless in her attempts to make Madame Mini-Dragon into a pet.  Despite this, she does understand that the dinos are not dragons, and feels herself and the other dragons to be superior to the dinos. Amusingly enough, her chicken instincts come through enough that she sits on any eggs in the group's cave to help hatch them, though she has no maternal feelings towards the hatchlings once they are born.  She likes to sit at the mouth of the cave and trade glares with the larger dragons, convinced she is just as tough as any of them.