Just some newbie questions. Would greatly appreciate answers! 1. I read somewhere of someone referring to a duck's "bean." My interest is piqued. What part of the duck is the bean? LOL 2. Are ducklings just clumsy sometimes, or is an occasional "oops, I rocked too far back on my heels and tumbled over" something to be worried about? indicative of a niacin deficiency or me being an overprotective worrywort? 3. What is TSC? I see this ALL THE TIME here but I have no clue. Is it a store? I live out an island with virtually no stores so 'scuse my ignorance. 4. Do you shut your ducks in at night or are they happier just left to their own devices? Do they tend to go in the shelter/coop at night on their own like chickens do? Please note that safety isn't a factor because we use VERY secure pens (buried perimeter, total roof coverage, close to our house) for our poultry.