Music by Kevin MacLeod (original composer: Gioachino Rossini). Available under the Creative Commons Attribution 3.0 Unported license. Download link: https://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100676

MacLeod's description:

Genre: Classical
Length: 1:25
Instruments: English Horn, Flute, Bassoons, Strings

Ranz des Vaches or "Call to the Dairy Cows" is a small but famous section of the overture to William Tell by Rossini. It is most often used to depict morning or sleepiness in cartoons. Hook starts at 0:21.
ISRC: US-UAN-11-00676
Calming, Relaxed, Uplifting 2010