I was recently "surprised" with the gift of 4 ducklings, 2 boys and 2 girls. The boys are Pekin, the girls Crested Pekin. Since I really only have room for 2 ducks, and since my daughter will take 2, should we separate them as boy/girl pairs (neither of us wants any future babies), or is it ok to separate the boys from the girls? Will 2 of the same sex be ok together? Appreciate any advice you can give.