Eggbound and in trouble!

Oh dear, she may have more than one egg stuck there now. She really needs urgent treatment and antibiotics,otherwise she will die very soon and in a lot of pain, I am sorry and please dont think me harsh.

A cracked egg inside invariably leads to infection. You can give her a salty tepid bath which will help gently cleanse the area and the warmth may help her muscles ease and help pass the remnants. If you can see the egg or fragments and this you could try gently removing them with very clean hands,make sure you dont distress her too much. You need to remove as much of the egg as possible. Give her a  dispersible baby aspirin to help reduce any inflammation. Keep her inside, in a warm utility and a dark cardboard box, leave her completely undisturbed.

Really a good idea is to get her to the vets(or cull if you have decided not to take your chickens to a vet). She will need a calcium injection to try and stimulate her pelvic muscles and help move any eggs along, plus metacam inj. to reduce swelling and discomfort.

Finally, I can't emphasis enough, young pullets should only be given layers pellets or mash, please avoid treats they really don't need them! Especially hybrids. I dont give my birds anything, even in this cold weather, no supplements just Apple Cider Vinegar and a garlic clove crushed in water all year round. Maybe a few times a week a few grains of corn to help keep them active and warm if temp gets below zero for too long

sorry about your hen I would cut out the barley completely and just feed layers pellets. A little barley as scratch in the afternoon will not do any harm though. The problem with mixing  barley/layers is they will pick out all the barley in preference to the layers!