Yes Hamburg chicks are very delicate.
They are tiny and frail for the first 2 weeks.
If you get any brood them separately from your other chicks and use extra draft protection. Definitely use sav-a-chick in the water and don't try to handle unless pasty butt happens.
Seriously I have raised about 160 chicks and these were very delicate. Even more delicate then my Polish that 90% of the shipment were lost due to an extra 2 days in transit.
Seriously, an extra 2 freaking days!!
The Polish were shipped early, no notification, on a Wednesday AND did not arrive until Monday.
I have only ever lost 2 as chicks. One was due to a cold snap and I did not have enough heat set up. The other was a hamburg. It was fine for 3 days after arrival then suddenly died. Not sure why but the others would get wobbly and weak if I did not grind the feed until it was like fine sand.
Just want you to be ready. They were great birds. Just need extra care the first couple weeks.