Okay...I got some epsom salt water in Lydia, not the entire 1/2 cup, but I tried. Her crop felt like a deflated balloon and spongy afterwards.
Two pharmacies on the way home didn't have large syringes.
But I found this in the shed!
Aquarium airline tubing (new) attached.
I wrapped Lydia in an old bath towel though she's too weak to put up much of a fight.
I got water in the syringe, attached the tubing, and
miracle of miracles, got the tubing down in the crop. Pee-eew, nasty rotten smell wafted out.
But the syringe was probably too old, might be brittle plastic as it leaked around the tip, above the tubing. I got some of the solution in Lydia, but also some ON Lydia.
Unhappy wet hen.
I massaged the crop after each attempt to flush it. Lydia did her neck gyrations, and belched, nasty smell.
Taking a brief nap afterwards.
After Lydia rested for a few minutes I put her down and she pottered to the back of the coop, to get away from me I am sure.
I'm going out before dark to check on her, make sure she's dry, and give her some Nystatin.