I have two cats running around the house. Both are from the same litter. One was the runt, weighing 3 lbs. and change at the 3 months check-up. The other was the alpha male knocking his siblings senseless to be the first to Mom's milk outlets. He was a svelte 10 pounds at the same check-up. When he was neutered a couple of months to counter early spraying and humping of the female, he was at a solid 15 pounds.
Three years later the female is at roughly 7 lbs., the male is the Shaq of Cats, long and 30 pounds. Dogs crap themselves when he goes walking by. I think this real world example thoroughly discredits the "Cat - Particle Wave Duality" hypothesis.
Someone should investigate this with penguins, say an older Caltech scientist with too much time hands. Have you ever noticed how all penguins look and behave remarkably alike despite the great distances between them?