This simplified version of Cluck Old Hen is based on the Fiddle playing of Alison Krauss. Her version is based on the Stanley Brothers.
If you are a beginner player learning this tune, don't feel bad about trying to practice and learn at a tempo below 60. Go as slow as you need to get the notes right. Pause and go note by note, then measure by measure if you have to.
Once you start connecting notes and phrases, slowly work your way up to the goal tempo of 60 bpm.
If you are an intermediate or advanced player you can use this simple version and challenge yourself by cranking up the tempo :)