Who said "Isn't that nice."?

This quote is attributed to Droopy.

Isn't that nice. - Droopy

"Isn't that nice."

Droopy Humor

"I'm so happy."

"Hello, I'm so glad to see you."

"That makes me so sad."

"I'm afraid I have some bad news."

"Never underestimate the power of a good laugh."

"Laughter is the best medicine."

"A good laugh is the best medicine."

"Laughter is contagious and wonderful."