How much should my ducklings weigh?

[billplatypus]

I have 3 Swedish girls that are 17 days old. They are happy and seemingly very healthy. Im wondering how much they should weigh. Does anyone have a link to a resource that can tell me average weights and growth stages? They are happy at 75 to 80 degrees, anything more and they pant. They were shedding all sorts of down when they had a bath yesterday. They are even starting to attempt quacking. Is this normal at 2 weeks? Are they over- achievers? Am I feeding them too much?

 

[billplatypus]

Maybe my question got buried. Here is a pic of them in their pond to entice you to want to respond

 

[dotknott]

I tracked weight on some of my Saxonies this year: http://herouxpotager.com/ducks/2016-01

Different breed, but might be good to see.

Some ducks start quacking at 2, 4, 6 weeks. It varies by the duck. I've definitely heard 3wk olds quack in protest.

You should start seeing pin feathers in a week or so.