Hi. well to me its looks like a full bred Yorkie pup..who is changing very quickly as they all do. In fact it looks like my Dustie...smooth coat when very young and a fluffy coat as they get a bit older...
I don't think from looking at those piccies that there is anything wrong.
I brought Dustie home at 8 weeks..He was so very tiny...I was told he would be a teacup ...but he has grown a bit..
.They change so very quickly..
Chris x