I am so sorry to hear about your drake. If the abdominal cavity has a large opening enough to see an organ, I would definitely see a vet asap. That is going to need stitches to prevent anything getting inside and causing sepsis, which may have already occurred if the tissue is starting to rot. I would keep it wrapped up so dirt from its beak or poop on its bedding will not get into the internal body cavity.
I don't want to be a downer, but the body cavity is a sterile part of the body and infection can spread easily there and be very deadly. The best chance would be an antibiotic you have on hand or if you can get one from a vet so you can start immediately. A vet will be able to better access the damage too and remove any necrotic tissue. You can order antibiotics, but I worry it could take too long to get.
He is a beautiful drake, and I hope gets better soon.
I don't want to be a downer, but the body cavity is a sterile part of the body and infection can spread easily there and be very deadly. The best chance would be an antibiotic you have on hand or if you can get one from a vet so you can start immediately. A vet will be able to better access the damage too and remove any necrotic tissue. You can order antibiotics, but I worry it could take too long to get.
He is a beautiful drake, and I hope gets better soon.