Sour crop? Or something else?

[Nope123]

I brought home a Orpington mix 6 days ago and now she’s doing really bad. She’s not eating or drinking and can’t stand.she was fine this morning but now she looks like she’s dying. She’s bobbing her head from side to side. I don’t know what’s happening but I think it’s too late for her. Her crop is so small I can’t find it so I think it’s empty. What could possibly be happening?

 

[Nope123]

Additionally: she’s way smaller than a normal Orpington and she was very skinny when I got her

 

[coach723]

Do you know how old she is? What do droppings look like?
First thought is coccidiosis since that is very common, particularly in young birds or birds that have been moved to new ground. If you think it's cocciciosis then I would start treatment right away to see if you can save her, it can progress very quickly to death.
Where are you located generally? In the US Corid is the most common treatment, available at many feed stores and tractor supply. Either liquid or powder form can be used, liquid is a bit more convenient if they have it. I will put the treatment chart below in the event you need it. You also should give her some orally, dosing here: https://www.backyardchickens.com/threads/corid-oral-drench-instructions.1211991/
And give her the medicated water several times a day until she starts drinking it on her own. Use the severe outbreak dosing.
Any other symptoms at all? Sometimes the stress of a move can cause an underlying illness to surface. Hopefully you quarantined her so you haven't exposed any other birds to whatever she has in case it's contagious.

 

[Nope123]

Do you know how old she is? What do droppings look like?
First thought is coccidiosis since that is very common, particularly in young birds or birds that have been moved to new ground. If you think it's cocciciosis then I would start treatment right away to see if you can save her, it can progress very quickly to death.
Where are you located generally? In the US Corid is the most common treatment, available at many feed stores and tractor supply. Either liquid or powder form can be used, liquid is a bit more convenient if they have it. I will put the treatment chart below in the event you need it. You also should give her some orally, dosing here: https://www.backyardchickens.com/threads/corid-oral-drench-instructions.1211991/
And give her the medicated water several times a day until she starts drinking it on her own. Use the severe outbreak dosing.
Any other symptoms at all? Sometimes the stress of a move can cause an underlying illness to surface. Hopefully you quarantined her so you haven't exposed any other birds to whatever she has in case it's contagious.
View attachment 1653930

Sadly she already passed but I tried to make it as easy for her as possible. I guess it was the stress of the move. I live in Sweden and I actually don’t know how common cocciciosis is here.

 

[coach723]

I'm so sorry for your loss.
A necropsy would be the best way to know for sure what happened.