I think I rushed things, I bought Pekin Duck hatching eggs earlier and now have 2-week-old ducklings, They will soon outgrow their brooder and I don't have a larger one for them, The question is how soon will they outgrow this brooder before I can put them outside in their coop? I know it all depends on timing, The night temperatures are going down to near freezing now, From these pictures how much time do I have before they are too crowded?