I opened a new thread on the questions mentioned above here in our forum. I hope this is of interest for the whole paro community. Richard, it would be great if you post your answer there.
Helene, in his German answer Richard Brode estimated your young nagyi as possibly being 6 weeks (+/- 5 days) old – due to the fact that the juvenile dress evolves from the 4th to 7th week of life.