Squeaky dog toys have been a staple pet accessory for decades, made from rubber or vinyl with an internal squeaker that sounds when bitten or squeezed. Recordings of that squeak spread online through pet videos, prank clips and soundboards, where the short burst became a reusable reaction effect. Because real dogs respond instinctively to the high pitch, creators use the audio alone, without a toy in frame, to trigger a reaction on camera. Its one-second length keeps it popular for quick edits, streams and pet focused memes.