Why didn’t the cow laugh at my joke?

Why didn’t the cow laugh at my joke?

He wasn't very amoosed because it was udderly lacking in humor, he had herd it before, it wasn't very mooving, it was cheesy and I milked the punchline a bit too much. Definitely wasn't moosic to his ears. He still gave me a pat on the back though, which put me in a better moood.

I was at a joke competition too, so the steaks were high, yet I still managed to butcher the joke. I knew I should have stuck to that cowculus competition instead, except everything goes in one ear and out the udder in my math classes.

Ok you should stop reading here, it's probably pasture bedtime.