Another thought ... if a female member of your household is pregnant, can you also adopt? and if so, you could time the adoption of a nooboo to occur on the same day as the nooboos arrive through birth. Also, the father could get abducted and be impregnated, which could occur on the same day as the birth of nooboos ... or two mothers in the household could give birth to twins on the same day ... which aren't exactly quadruplets ... or a cat/dog/horse could have a kitten/puppy/foal on the same day as the birth of the nooboos.