Yes it can smell a bit gross.
Yeah, I wouldn’t clean the rest of the duckling yet. But you can use warm water and a Q tip or cotton ball to gently clean it once it has finished absorbing and is getting stronger. I wouldn’t risk it now because you don’t want to chill it and you don’t have a...
It’s not a lost cause. Keep the duckling warm and give it time.
Like @Debbie292d said, the umbilical will shrivel up and fall off on its own. When that does happen, you can put some antibiotic ointment on the navel. I did that several times a day.
If you think it’s eyes are sealed shut by...
If the duckling starts lifting it’s head and getting a bit more active I might try dipping its bill in sugar water or electrolyte and see if it drinks a little bit. But while it’s still absorbing the yolk it shouldn’t need nutrition
If you have an incubator, put it inside a small cup lined with paper towels and put it in the incubator.
I’m assuming you don’t have an incubator. If that’s the case, try to keep it around 99 degrees while it finishes absorbing the yolk. You can also put it inside a small cup lined with paper...