I bought two large-ish Pekin duckling hens at the local swap. Their big (compared to my other guys)...but still covered in that fluffy down. When is it generally considered safe to let them run in the yard (supervised) with my adult drakes? They're quacking like big girls, I don't want them to get hurt by my drakes if they think 'Hey! Ladies!'. I let my smaller Rouens, Khaki Campbell, and lone Pekin ducklings roam a little outside the tractor-coop, but that was in a rather small pen with a little 'pond' (large waterdish). Also, is there any possible way to train the ducklings to go up the ramp to the top of the coop? The tractor unfortunately doesn't have a door on the lower part, so half the time I chase ducklings around the yard. I've gotten pretty good at bribing them back with food (they are apparently convinced that the NEW food tastes better than the 'old' food) but still...if they would just go up the ramp!