I think this is a good idea if you can flush the inside of the uterus, otherwise it's just an intestinal enema, right? I've actually done something similar when a hen had a stuck egg... I took one of my catheter tubes and squirted some OB lube into her uterus, but it wasn't easy getting it in there, lol.Dawg53 has rcommended flushing out the inside of the vent with a weak white vinegar solution and a syringe, to cleanse the area after a hen has a broken egg before. I think that makes a lot of sense. You could use some weak betadine also, or a commercial product.

-Kathy