I got three khaki campbells early march. Last week I gave away two that were drakes. Now she has two 4 week old ducklings as buddies, but she has started to have loud QUACK QUACK QUACK QUACK moments. She hardly ever did this before the drakes left, but now she does it many times a day. Is this just what females do? Should I expect my Welsh Harlequin and Runner to do this also? We live in an urban area so I'm slightly concerned about the neighbors being irritated by it.