Hello I'm new from Australia, I've been reading and learning a lot from these forums but recently one of my duckling's health suddenly declined. I have two pekins, roughly 9 weeks old now but i got them when they were 3 weeks. When I got them, Archer is the strong one, running around and peeping all the time and Rex is the one that eats and sits down a lot. At first I thought this was normal and some ducks can be lazy or heavier. I give them the right feed, niacin in water, clean pen everyday, bath every morning and making sure they are dry... Rex was taking a few steps and sitting at 6 weeks. I was letting them forage in my yard and we don't use any chemicals/pesticides etc. then at 7 weeks it started to just walk on its hocks like it can't keep its weight up, feeling a bit lethargic, panting and just gives up and sits in the shade. I thought it was a weight issue but i looked at Archer and he seems fine... At week 8, Rex stopped paddling in the water...he just floats and dunk its head now and then. I've also noticed it stopped preening and he sinks easily so I only give him a bath for 8 mins or so. He won't walk at all and I checked his feet and body for any sign of bumblefeet or mites etc...but nothing. He stopped eating but was still drinking so then I thought it was botulism and I used the activated charcoal flush https://www.backyardchickens.com/t/700526/flushes-for-aiding-in-toxin-removal and some TLC tips from https://www.backyardchickens.com/t/444164/sick-weak-duck-what-is-wrong-what-treatment (Thank you so much!). It was working with a bit of garlic, yogurt and honey, apple cider and water. He had a bit of movement back in his legs but not much. Until the next week, I got home and Rex is so much worse all of a sudden His beak had some discoloured spots, a bit slimey, it looks bloody, some of his neck feathers fell/pulled out, watery eyes, laboured breathing, bad diarrhea, wings kinda shaky, not eating but still drinking and peeps when I'm around. So now I think I've narrowed it down to aspergillosis and gave it some fluconazole last night, changed bedding, did a epsom salts wash because of the diarrhea, diluted some iodine and wiped his bill etc. This morning he kinda looks the same but the bill is a little better...I read "It is one of the toughest avian diseases to diagnose and successfully treat, Since fungal organisms grow very slowly, usually by the time a bird has clinical symptoms, in most cases the disease is in an advanced stage, so you're working from a disadvantaged position" and this site has been very useful: http://www.veterinarypracticenews.c...ept/avian-respiratory-problem-treatments.aspx Ducks are so good at hiding their symptoms! I don't know if it's too late, I was thinking of taking it to the vets today...I also found a moldy yellow papaya leaf where they were foraging I wish i had seen this earlier! arghh >< Do you think he'll make it? I'm being hopeful but his symptoms are bad. How long does it take to treat this? Sorry for the long post, I can upload some pics if you want to see how bad it is.