Little Johnny was wondering one day

Little Johnny was wondering one day and decided to ask his dad.

“Dad, how come big dogs can make little dogs and big cats can make little cats but why can’t Big trains make little trains?”

Little Johnny’s father replied,

“Well Johnny, this sounds like a great quey for your mother.”

So off Johnny went to go ask his mother…

“Mom, why do big dogs make little dogs and big cats make a little cat but why can’t Big trains make little trains?“

Little Johnny’s mom thought about it and said:

“Well, Johnny, this sounds like a good question to ask Mr Jones down at the railroad yard”.

So off Johnny went to go ask Mr Jones.

“Mr Jones, why do big dogs make little dogs and big cats make little cats but why can’t Big trains make little trains?“

Mr Jones looked at Johnny seriously and said,

“Well Johnny, that because Union pacific always pulls out on time!”