Crop very swollen first thing in the morning — sour crop treatment?

threeblueducks

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Hello,
This morning when I let out my chickens, I noticed that one of my two ex-meat hens, Robin, had a very big looking crop. Upon closer examination, it felt like a balloon full of air, completely full. She is a big hen, but the crop was around the size of an apple or tennis ball, not hard, but not doughy.
I isolated her in our sheep stall, which has a dirt floor, and gave her only water, as I have read to do during the first 24 hours for sour crop.
Robin is less than a year old, born in March. She is very heavy (could be described as obese) but is otherwise a normal chicken, lively, eating (or trying to anyway). I did notice that when I picked her up she made kind of a gurgly, swallowing sound and seemed to be re-swallowing liquid. While I was down there, she pooped once and it was watery, yellowish, and appeared to be mostly urates with a small blob of fecal matter.
There has been a slight change in their feed — in the last couple weeks, we started mixing in textured layer feed or scratch with their all-flock, to help them keep warm as it is getting colder. Also, we set out a dish of oyster shells and grit for them yesterday, though I didn’t feel anything that felt like that in her crop. (I didn’t want to press too hard on it tho)

I did not want to make her throw up her crop contents like a couple articles were suggesting because that seems dangerous and very uncomfortable for her.
One article said to give some apple cider vinegar and another said that yogurt might help. If either of these are good options or if you have any other ideas, please let me know!
Is this sour crop? If so, what are the best steps to treat it?
I really want to help her, so any advice would be greatly appreciated!!
 
When you say "ballon of air" but the crop isn't hard or doughy, is it just really puffy?
If it is, it might be a possible she has a blockage.
Any bad smells?
Is she a Cornish cross?
Stop mixing the scratch in their feed, that's a myth and a false one as that.
 
When you say "ballon of air" but the crop isn't hard or doughy, is it just really puffy?
If it is, it might be a possible she has a blockage.
Any bad smells?
Is she a Cornish cross?
Stop mixing the scratch in their feed, that's a myth and a false one as that.
No, it felt like it was full of a liquid, and I noticed that she regurgitated some liquid a couple times.
I didn’t notice any bad smells, but I didn’t specifically check. She is a red ranger/freedom ranger.

Oh I had no idea. I will not mix it in the future.
 
No, it felt like it was full of a liquid, and I noticed that she regurgitated some liquid a couple times.
I didn’t notice any bad smells, but I didn’t specifically check. She is a red ranger/freedom ranger.

Oh I had no idea. I will not mix it in the future.

It sound more like a blockage, that caused some sour crop.
Here's some information, I've not felt with this personally.
 
No worries, thank you!
Robin is looking better. I just checked on her and she had done 3 normal-looking poops and one fecal poop, and her crop was still full but definitely not as swollen. I had compared it to a full balloon before because of how taught it was, but now it feels more like a slightly deflated one — squishy and soft like a normal crop. I checked her mouth and there wasn’t really a smell. It wasn’t sour or fermented smelling.
 
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I forgot to include these pictures of her this morning in the original post, so I thought I would add them just in case they are at all helpful:
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Tonight when I put Robin to bed, her crop was a bit smaller but not by much. So it was still full, but hopefully it should clear some by the morning. She had also laid an egg, which I assume is a good sign.

However, I’m not sure what exactly to do for treatment. It isn’t sour crop (at least not yet?), but also not (?) impacted. Should I treat it as if it were impacted, because @nuthatched said that there was probably a blockage?? And should I just feed her regular/moistened chicken feed tomorrow, as stated in TwoCrows’ article?
 
Tonight when I put Robin to bed, her crop was a bit smaller but not by much. So it was still full, but hopefully it should clear some by the morning. She had also laid an egg, which I assume is a good sign.

However, I’m not sure what exactly to do for treatment. It isn’t sour crop (at least not yet?), but also not (?) impacted. Should I treat it as if it were impacted, because @nuthatched said that there was probably a blockage?? And should I just feed her regular/moistened chicken feed tomorrow, as stated in TwoCrows’ article?
See how it goes in the morning, if she's still pooping normal poops, llthats a hood sign. If the poops turn green, that means nothing is getting through.
It could be a partial obstruction or just slow.
 

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