Neither Robert Clampett nor Chuck Jones cared much for this short, not because they thought it was bad, but because it used an iron lung as a gag prop at a time when polio deaths were on the rise.
I must have it quiet!
Daffy Duck: SHHH! Shut yo' mouf! Zol zayn sha! Silence is FOO! Hoo-HOO!
This cartoon was colorized in 1968 by having every other frame traced over onto a cel. Each redrawn cel was painted in color and then photographed over a colored reproduction of each original background. Needless to say, the animation quality dropped considerably from the original version with this method. The cartoon was colorized again in 1995, this time with a computer adding color to a new print of the original black and white cartoon. This preserved the quality of the original animation.