You’ll know why

There’s a dog barking in a tree
Somewhere over there
A cat walking upright
One dog and two catfish
Swimming through the air
At this point
I no longer care
What you see
Isn’t always there
It’s when you see it
You should care
If you’ve never
Ever seen
A whale
How can you
Hear
One cry
But if you have
Seen
A whale
Then you’ll
Know
What I mean
And why.