We have one 4 week old Rouen, not sure male/female, one 4 week old mallard, and two 3 week old mallards - they are all supposed to be female. Price - our 4 week old Mallard female - but her bill is quite yellow (not orangey) at this point? Doesn't show well in the pics. Soap - our 4 week old Rouen - he is definitely huge, but not as feathered as Price and they are the same age...maybe 2 days apart. My son is 14 and almost 6 feet. Soap is easily as long as his forearm. The 2 little ones at 3 weeks - Napoleon (the smallest) and Josephine 4 ducks in a tub! They LOVE their swims. The little ones go underwater and swim underneath the older one's, right between their legs! The older ones are sort of quacking with a definite quack every now and then....they grow up so fast!!!