What's that sound?

Oh yes! It's little peeps that are alive! Yes, it's spring here in Minnesota and I couldn't resist getting a head start on the bug control by raising my very own little ecologically friendly bug management system.
This is the first day we brought them home... The ducks were almost the same size as the chicks.

This is one week after we brought them home. The chicks are getting lots of wing feathers and have started to get tail feathers. The ducks are growing at an enormous rate!

 

 Especially one of them! The bigger one is almost twice the weight as the other one. Their personalities are much different as well.  The smaller one is more quiet and docile and the bigger one is more outgoing, curious and extroverted.  The bigger one eats from my hand, where the smaller one doesn't want to so much.

No names yet, we are waiting to see what sex they are. Suggestions?