FOR THE FUTURE:
This situation began because I had (still have) a handicapped drake. He can't walk. I had him in a kiddie swimming pool bin in my house. When it was time to clean it out, it barely fit through the front door and was awkward to carry. It was tiring - what with washing, scrubbing, drying... the whole thing took nearly 45 minutes.
So each day I just topped it off with new, clean hay and I thought I was doing OK. I cleaned out the entire thing at the end of the week. But they both spilled water, and I guess mold grew in the litter where I couldn't see it, and probably Cinnamon went digging in the litter...
ANTI-ASPERGILLOSIS PEN: I have now devised an anti-aspergillosis pen for my handicapped duck Apple (who continues to do well -
he didn't go digging in the litter) and his companion. First, it is so very easy to clean that I clean it several times a day. Second, even if I did not clean it (that would stink), and even if mold grew (which I would clearly see) - the ducks would STILL not be in contact with the mold. Here it is:
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To clean: turn on the water, use the (empty) bowl to throw water at the high end of the tub. All the mess disappears down the drain. All clean in about 30 seconds or so.
The black food bowl was regularly spilled. I replaced it with two red buckets hanging from the towel bar (one is seen below for water).
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When it is time for a swim, the entire platform can easily be lifted out of the tub. Then the bottom of the clear curtain goes INTO the tub and prevents splashes wonderfully. No more wet bathroom floors! When the swim is finished, the platform goes back up in seconds. It is awesome! When I pull the top off for their swim, I first disinfect the bottom, then wash it carefully before filling with water. Cleaning time with disinfectant and rinsing is about 3 minutes.
I have now used this setup for more than a month. The ducks are very healthy and it continues to work excellently. I like knowing that they are safe from aspergillosis. There is slight food wastage, but this is well worth the safety factor. I take them outside to feed treats that they need to chase down, like crickets, or salad (they tear it up and chase the pieces down)... or I feed those while they are swimming.
Protect your ducks from aspergillosis and aspergillomas! Once they have the disease, a cure is occasionally possible but sadly, frequently unlikely. Prevention is best!
NOTE: In my regular duck house, the only place I still use hay or straw is the nesting box. It remains quite dry, and is rarely soiled by waste. My duck house pen floor used to have straw, but when I looked (after Cinnamon got sick) I did find mold in some places, so that was removed and I disinfected everything. I'm lucky that none of my outdoor ducks got aspergillosis from that mold. My floor material is now sand. This is not as warm in winter, but remains mold-free. Next winter I might have to put in a heat lamp for cold days, since they don't have straw to snuggle into any more.