STONER RATS?

   No; they're just chillaxin'. It was a point of discussion for this Ranger Rick magazine article about the effect of music on plants and animals.  One scientific experiment seemed to show that lab rats and some other animals become more relaxed when they listen to music.  My first sketch was meant to show the rats relaxed and grooving; but the editors remarked that "they look like they are stoned and have the munchies".

They thought the vapor coming from the test tube looked like smoke. Not my intention at all; but after another look I can see how they made that association!  I sent the sketch to rehab.

The editors were relieved. Then I decided I wasn't happy with the scale of the test tubes in the background and felt like the eye dropper commanded too much attention so I tweaked it once more and returned the cheese to the lower right corner to balance out the color.

The article didn't say what type of music mellowed them out, but I'm guessing it might be "experimental jazz".
  Graphite and charcoal base; photoshop color.