After Paul and Dora get a hat, from the lost and found, they return to Paul's dorm (at the vet). They notice that a newborn kitten is on the floor so they help break the membrane and bring the kitten to the mom. Yet when they approach the mom you can see that the litter of kittens are about a month old and not newborn kittens. Newborn kittens can't open their eyes, are very tiny and they barely meow, yet you see kittens with open eyes and they're meowing.

So how is it possible that this litter of newborn kittens developed so fast?