Thinking of getting some Muscovy ducklings in March. Considering how quickly they grow, how does someone brood them indoors (outside can still get frost through May 1st in the PNW) without making a large and elaborate structure? I have an extra large dog Crate at my disposal and intended to start them out in the tub, then maybe move them into in large rubbermaid bins (which will be great for storing straw and food bags when they get moved outside). Is that enough? I suspect that they will get quite large over the course of the 6 weeks or so it'll take them to get big enough to go outside full time. Input?