I have three Welsh Harlequin ducks and one drake all about 9 months old. I got my first egg on January 12th and have been getting a egg a day sense. At nine months I would think they would all be producing eggs. they eat high protein flock raiser and get supervised free range almost daily. I have been told Welsh Harlequins are prolific layers but why would only one of my three be laying at this age?