I got 5 campbell ducklings from Rural King (Cackle hatchery). 2 are boys and 3 are girls. 10 weeks old. Is this ratio ok or should I get more girls. I saw on craigslist someone has juvenile/adults for $10. Is that a good price and how many girls should I get. They also have WH should I get one of those to be a broody mother or do cambells sit well?