I switched out the itty bitty duck pond and put our 3 rouens into a regular sized kiddie pool last night. (Maybe a foot deep) They are all about 7-8 months old. When we were getting ready for bed I heard a sound like somebody grinding the heck out of an old truck's gears, but with a duck-like overtone to it. I checked on them and the drake had a smug expression and the one girl was in the pool with him looking sheepish. Are they old enough to be breeding? Neither girl is laying eggs.