Yes, I`ve read that a few places when I researched them before I got them. They did have their own pen when i had a pair, after the male died, she appeared sad (for lack of a better description). she stayed in one corner all the time, I never saw her eat or drink, I figured eventually she was going to die too if I didn`t do something. so, I let her out to free roam, that was 2 months ago and she`s been staying with my domestic ducks ever since, thriving and doing great. Eventually when i get her a mate, she will most definately be separated again from my domestics. thanks Tony