Hi, I have a hen I'm treating right now for an impaction.
I tried olive oil and apple cider vinegar with the mother and massage for a couple of days. This didn't work.
We did surgery. and gave her an anti-fungal ( Nystatin oral suspension, 1.5 ml, twice a day) and anti-biotic (we used a human one, which may or may not have been good, keflex, but my grandpa who did the surgery is a human vet.) She seemed to eat the hand-fed baby bird food called kaybee which you mix with water and feed with a dropper. also ate mash of cooked egg yolk, sifted lay mash to get out the big chunks, some unflavored yogurt, olive oil, and some fine sand. I gave her droppers full of olive oil and massaged after it wasn't painful for her. I also gave her a visitor after a week because she was lonely. I hope this helps and you have good luck.
I am now trying to figure out the dose for Reglan for her to see if that will get her going. I think this might work for you too if you tried the evoo and vinegar and massage. hopefully we can figure out the dose.
Best,
carly