Who said "The world's gone mad, and that dog is the proof!"?

This quote is attributed to Eustace Bagge.

The world's gone mad, and that dog is the proof! - Eustace Bagge

"The world's gone mad, and that dog is the proof!"

Eustace Bagge Truth

"Stupid dog! You made me look bad in front of the whole town!"

"I'm not paying for that!"

"Why does everything bad happen to me?"

"Get away from me, you fleabag!"

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."