The screenshot of the American traditional short film <a href="https://en.wikipedia.org/wiki/Gold_Rush_Daze" class="extiw" title="w:Gold Rush Daze">Gold Rush Daze</a>, part of the <a href="https://en.wikipedia.org/wiki/Merrie_Melodies" class="extiw" title="w:Merrie Melodies">Merrie Melodies</a> series. Depicting four unnamed anthropomorphic miner dogs are performing the song together in the <a href="https://en.wikipedia.org/wiki/underground_mine" class="extiw" title="w:underground mine">underground mine</a> during the musical number My Sweetheart Needs Gold for Her Teeth.
<a href="https://en.wikipedia.org/wiki/Warner_Bros._Cartoons" class="extiw" title="w:Warner Bros. Cartoons">Leon Schlesinger Productions</a> (later known as Warner Bros. Cartoons (1944-1969))
Screenshot taken of <a href="//commons.wikimedia.org/wiki/File:Ben_Hardaway_and_Cal_Dalton_-_Merrie_Melodies_-_Gold_Rush_Daze_(1939).webm" title="File:Ben Hardaway and Cal Dalton - Merrie Melodies - Gold Rush Daze (1939).webm">the video</a>, ripped from <a href="https://en.wikipedia.org/wiki/The_Golden_Age_of_Looney_Tunes#Volume_4" class="extiw" title="w:The Golden Age of Looney Tunes">The Golden Age of Looney Tunes: Volume 4, Side 8 - Ben Hardaway and Cal Dalton</a> (<a href="https://en.wikipedia.org/wiki/LaserDisc" class="extiw" title="w:LaserDisc">LaserDisc</a>, 1993).