After three years of raising chickens in my suburban backyard we finally moved to the country where much to my husbands dismay, I can bring all sorts of animals home. That being said I am bent on getting some ducks this spring. As pets, pest control for the garden and my sheer obsession with their cuteness and quacking are all the reasons we're considering getting some Rouens. So, questions: Can I use the 100 gallon aquarium I used as a brooder for my chicks for ducklings? I read that they can be let out to free range as young as two weeks? I also read that if we get a drake it may attempt to mate with our chickens?! We want to have the ducks and chIckens free range together? How many is too many? We were thinking about getting just one pair. We have a giant bathtub that we pulled out of our house during a reno, could we turn this into a water source/pond for two Rouens? Any other general opinions on Rouens or major differences between raising ducklings and chicks would be greatly appreciated, as well as suggestions for other breeds that maybe we should consider.