Got some new ducks about 3 weeks ago. Couldn't have been but a few days old when i got them. Doing great. First time buying them at the same time. They both have that squeak. One of them sound a bit different sometimes. Wondering at this age would this tell the gender. Were sold a straight run where I got them from. My last 2 ducks made it 7 months Male and 2 months (uknown) The one that sound different is probably Indian Runner. Not sure about the other duck all black including feet.