Everytime I see a little dog, I ask myself

It's not evolution, it's selective breeding...

Chihuahuas are more related to fennec foxes

Theoretically you could reverse breed a chihuahua back into a wolf the genes are there you just have to make them dominant instead of recessive.

my father never wanted to get a small dog, he'd say "that's no dog, that's dog food."

Selective inbreeding is more accurate.

Let's go back a few breeds.

Or pugs

Same way real corn 'evolved' to what it is today. An original ear of corn was the size of a dime.

My dad calls little dogs like this cats

Information is lost over time, not created. This is selective breeding.

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