If you watch a young puppy sleeping you will notice it twitching, jerking and sometimes making little sounds.
This is perfectly normal and actually a healthy activity. Because puppies spend so much of their days and nights sleeping, the twitches help their little muscles develop and strengthen. Likewise for the sounds which strengthen their vocal chords.
The older the puppy gets, and the more time it spends moving around its space, the less twitching you will notice.
I find it so endearing!
**Be sure to click on the CC tab at the bottom of the video to read the captions.