Hen with very watery poop, drinking lots of water, not laying

[FlockinAround]

We have a 2 year old who has always had some problems laying- she's laid soft shelled eggs, eggs with no shell and perfectly fine eggs too. She hasn't laid for about a week but for the past few months she has laid all normal eggs. On Monday we noticed she had watery poop and was a bit lighter than usual, on observation she is not eating as much as usual. She seems to be drinking more water than usual, we are in SoCal and it has been cold (for us, in the 40s 50s at night 60s/70s day) today her poop looked like straight WATER - there no change in diet or activities. They do get time in the yard each day and eat grass so I didn't find the green in her poo that alarming, but maybe it's not normal?
I added the rescue 911 powder to their water on Monday because it's what I had on hand. Anything else I might be able to do to help her? We only have 3 hens and the other two have normal poops and all seem to be acting normal. I'm worried about Egg peritonitis because of her history with soft shelled and shell-less eggs....poop pics from overnight last night attached and she was standing puffy for like one minute but didn't stay like that long, went back to pecking and scratching around right after I took the pic.

 

[Eggcessive]

It is always hard to know exactly what is going on just from poop pictures. You have a good sample of pictures though. From the dark green poop, that could be from not eating enough food. The bright yellow bits could signify a reproductive infection. A the bloody bit, would prompt me to either get some fresh dropping s looked at by a vet with a fecal float, or just go ahead and worm her. Valbazen is my preference, and dosage is 1/2 ml given orally for a 4-6 pound hen. Repeat it in 10 days. You also could use SafeGuard liquid goat wormer or the horse paste, 1/4 ml per pound orally given for 5 days. Those treat round, cecal, gape, and capillary worms. Is her crop empty first thing in the morning? Is there any swelling in her lower belly under her vent? Can you try to get her eating some mushy wet chicken feed, soft cooked eeg or rinsed tuna along with her regular dry feed?