It's totally alright! He's so small that's why he's dreaming much

Ok we were tensed beacuse his is our first pup

When they are in a deep sleep they often move their legs slowly as if they are dreaming just like us when we dream we either change our sides or move our hands and legs.. it's totally normal...

All puppies and even some grown ups do that. Dreams could be a reason. It is absolutely normal. Sometimes my lab barks in the sleep and keeps kicking.,. I would imagine he is dreaming of kicking dirt on a fight.

This is common problem in almost every puppy...sometimes puppy suddenly started to barks or even moving feet like he running... So, Dreaming is the only reason for this.