Trying to figure out what was wrong

[Wyorp Rock]

Thanks for the photos.

To me, it looks like Cystic Right Ovary.

 

[coach723]

I think @Wyorp Rock is probably correct. Found the image below which shows a cystic right ovary, looks very much like yours:

 

[Wyorp Rock]

At about 45 he says that the right oviduct often gets swollen and filled with fluid, so that might be it.

Yes, you got it.
Sorry I said Cystic Right Ovary/Oviduct.
A female chick generally has 2 Ovaries and Oviducts, but the Right usually regresses and is non-functioning as they mature/develop. The Left Ovary and Oviduct are functional.

My musings/speculation...
Likely the Cyst was pressing on a nerve causing limping and eventually the leg lost function/paralysis due to this.


It's good that you were able to investigate further. Sometimes even when we take a look, we may still be puzzled or not have some type of clear answer about exactly what was going on, but there's usually something that can be learned. But in this case, now you can see what was happening and imho, there's nothing really that can be done to prevent it or treat it.

I'm not a vet, expert or anything, just read/research (a lot!).
Merck says it better!

"""As with most avian species, normal mature hens have only a left ovary and oviduct. The right Müllerian duct, which gives rise to the right side of the female reproductive tract, forms during embryonic development but normally regresses prior to hatching. Persistence of vestigial tissues from the right oviduct (or ovary) may result in formation of a cyst, a condition termed cystic right oviduct.""

https://www.merckvetmanual.com/poul...em-in-poultry/cystic-right-oviduct-in-poultry

 

[LaurenRitz]

Thanks for your help. I wondered if that might be the case, something pressing on that nerve.

I have already culled all of her descendants for other reasons except one cockerel that I hope to have a replacement for shortly.

I can see the reason for having only one ovary. I imagine that having two eggs coming from two ovaries was probably a serious problem for something expected to fly!

 

[LaurenRitz]

Yes, you got it.
Sorry I said Cystic Right Ovary/Oviduct.
A female chick generally has 2 Ovaries and Oviducts, but the Right usually regresses and is non-functioning as they mature/develop. The Left Ovary and Oviduct are functional.

My musings/speculation...
Likely the Cyst was pressing on a nerve causing limping and eventually the leg lost function/paralysis due to this.


It's good that you were able to investigate further. Sometimes even when we take a look, we may still be puzzled or not have some type of clear answer about exactly what was going on, but there's usually something that can be learned. But in this case, now you can see what was happening and imho, there's nothing really that can be done to prevent it or treat it.

I'm not a vet, expert or anything, just read/research (a lot!).
Merck says it better!

"""As with most avian species, normal mature hens have only a left ovary and oviduct. The right Müllerian duct, which gives rise to the right side of the female reproductive tract, forms during embryonic development but normally regresses prior to hatching. Persistence of vestigial tissues from the right oviduct (or ovary) may result in formation of a cyst, a condition termed cystic right oviduct.""

https://www.merckvetmanual.com/poul...em-in-poultry/cystic-right-oviduct-in-poultry

And the information at the provided link does say it's usually attached directly to the cloaca, so that fits as well.

Thanks!