I've never been convinced that the sun would come up without me barking.
Don't take anything for granite. That's what tombstones are made of.
When time marches on, it steps on your nose and tail, and leaves boot prints down your back.
I'm flatulent in many languages.
When you find a germ of truth, beware. Those germs can make you sick.
There's no better way to mess up a good cowdog than to let him discover that goofing off beats the heck out of hard work.