My chicken ate rubber?!

[CCsGarden]

Me again
Last week, I found out my brahma hen, Joan had a big crop. I checked her in the morning and it hadn't emptied. I started to treat for sourcrop and the first day I made her vomit, she let out big rubber pieces? So, whatever this is that she ate is causing a blockage. She has stopped drinking and eating. I've helped her vomit 6 times already and each time around 5-8 pieces of the rubber stuff comes out. I'm giving her fluids and yogurt with vitamins to help her keep her body going. Each time I go outside, she doesn't leave me alone. She will come up to me and let me know she wants me to help her vomit. I still don't know how she got away with eating something so big and hard without me knowing!?!

This rubber stuff doesn't even budge whatever you do to it.
Any ideas as to what this is?

Spoiler: The rubber stuff

Sorry, dirt got on some of the pieces!

 

[CCsGarden]

If anyone can help me I'd appreciate it!

 

[coach723]

I can't zoom in on the pictures to see what it might be. Chickens are known for eating things they shouldn't.
Is she pooping, and what do droppings look like?
Can you feel that stuff in her crop?
If the crop is full of it then crop surgery might be a option to remove all of that. Caution should be taken with vomiting a bird, they can aspirate the crop contents.

 

[CCsGarden]

I can't zoom in on the pictures to see what it might be. Chickens are known for eating things they shouldn't.
Is she pooping, and what do droppings look like?
Can you feel that stuff in her crop?
If the crop is full of it then crop surgery might be a option to remove all of that. Caution should be taken with vomiting a bird, they can aspirate the crop contents.

Yes, I'm very careful when making them vomit. Her dropping are white which I believe means she is starving. I made her vomit a little while ago right before I gave vitamins and yogurt. More of that rubber stuff floated into her crop. I can empty it but more keeps coming up. I'm thinking it's down in her gizzard as well.