Duckling Quarantine Advice Needed

[Heathers_Feathers]

I'm new to ducks, have had chickens for a while, but have run into a dilemma. I got a single Australian Spotted duckling a week and a half ago, Noodles will be 2 weeks old tomorrow, 5-17. Noodles was incubated, and the lady had lower hatching success than expected, which is why I only got 1. Since I got Noodles, I've been frantically searching for other bantam ducklings to give her "friends", which hasn't been easy.

I picked up two 2-3 day old black east indies ducklings yesterday from a farm, so they were out with their mom and other poultry in a run. I was already planning on keeping them separate for a while, but one didn't make it through the night. I noticed on the way home that this one wasn't as active/loud, but did see it eat and drink. Both looked healthy: droppings look normal, eyes clear, bill clean, etc.

So now what? What extra quarantine steps do I need to take? Meds I should get? How long should I keep them separate? I was trying to get away from a single duckling, and now have two. They both are on Nature's Best Organic Duck feed, and I gave the BEI electrolytes, along with the regular water.

Any and all advice is appreciated!

 

[Heathers_Feathers]

Update: BEI is doing well, although skittish. I did notice an odd sound when she's breathing, like a light crackle. I'm putting VetRX under her wings and on her head just in case it's respiratory, and also giving her vitamins along with the electrolytes. No swimming for her, either. She's definitely lonely, improved greatly with a mirror, though.

How long should they be separated? Anything else I should do?

 

[Miss Lydia]

Can you set them up where they can see and hear each other? By end of week if she is still acting normal I'd start putting them together.