we are thinking of getting some indian runner ducks but need help with info. 1. how tall do they get? 2. how many eggs does 1 duck lay a week? 3. how match space do you need per duck? 4. how do you sex them? 5. are the eggs bigger then large chook eggs would they fit in chook egg egg racks? 6. at what age do they start laying? 7. how many ducks to one drake? any help would be great. cheers youri.