Hello, I am in need of some help identifing the genders of my 4 baby ducklings. They are 4 weeks old and I do not feel comfortable trying the venting method... I was wondering if there were any physical differences between male and female ducklings at that age. I read somewhere about their legs and quack, but wanted to ask others to see what the valid method is. (Also, just out of side curioustiy, if anyone has any advice about how to tell the genders of turkies and chicks!) Thank you so much in advance!