Sick Pekin? Unsure, but please help

Hey again all;

One of my Pekin girls, Biscuit, seems to have come down with something. Rather, it doesn't seem like she's sick, but she's acting weird. Let me explain.

Yesterday she was all fine and dandy. Every morning after work, I go to let my flock out of their pen. All of them were chipper as usual: Excited to get let out. This morning, however, everyone besides her were all up and crazy wanting to be let out. After opening the gate, she was the only one left in there, and she was still sitting down. Going up to her resulted in the normal action that she always does; Putting her wings to her side and acting like I'm going to mate her (For some reason, it's always been this way).

Anyways, for the entire day today while everyone was outside and enjoying themselves in the pool and usual ducky antics, she stayed in the pen, laying down. I tried moving her out and about, but all she did was lay back down right away, or walk back to the pen and lay down in another spot. She drank water and ate food when she wanted, though, so she still has her appetite. Visually, I can't find anything wrong with her. No heavy breathing, she's not hot, no foaming at the eyes: Nothing at all, other than her acting....depressed?

Has she laid any eggs yet? New ducks can act really funny when they get ready for their first egg. Call it PES (pre egg syndrome - I've made that word up). Really some act depressed and don't want to leave the duck house for a day or two. They are usually all up and running once the first egg is out. The second thought would be that she may be egg bound.

Well, she's been laying for the past 7 months or so. I got her and Gravy as day old ducklings back last year, and they've blessed us with MANY eggs.

She laid her daily egg this morning, in the corner of the pen as usual. However, she's lately laid eggs with no shell, double yolks, and any variation you can think of. I do feed them oyster shells every now and then to keep the shells up, and it does help, but I'm not sure in this case. Anyways, she did act like this a week or so ago, and at that point in time she did have some foam start to build up in her eyes, but it was cleared up by morning.

I have read that if an unshelled egg bursts inside them, it can be really bad for them. Not sure if this helps or not. Perhaps someone else will jump in with better advice.

I really hope that's not the case. We don't have a vet around us at all that can look at ducks; At least, that we know of.

im going to say... maybe she is possibly broody! lol my pekin gets like that also sometimes. she snaps out of it!

Well, this morning, she still isn't any better. Still acting depressed like she was yesterday. She feels a little lighter too.

i had the same thing happen to my pekin, she was with a silkie chicken and then the silkie chicken went broody and the duck never saw her. she didnt run up to me she stayed in the corner.... she was totally depressed because her friend was gone.... as soon as i brought home a new duck friend for her she perked up and loved having a new buddy. also she was having an issue with egg laying so i brought her to the vet and she needed antibiotics. my pekin was rescued from a meat farm so she has issues