Thanks everyone! We have separated our ducklings . One of them have a sprained leg , he was walking around fine avout 2 hours ago but now wont put any weight on it. Going to get yeast in the morning to better fit the duck diet . And the coop is in the works . I live in south Tn is not too cold but the light keeps it really warm . They are scattered in the brooder. Not to close to the heat but not at the edges.