I have a juvenile mallard, I bought as a baby about 8 wks ago. I have no idea the sex either. I consider him a boy & have named him Lloyd. I only have the one mallard & he stays inside the house a lot of the time, except when we go into the yard together, so he can swim in his pool. I guess what I'm wanting to know is how will I know if he really is a boy & if I'm taking care of him properly?