Update: so I decided to cull her because she seemed to be slowly dying, she lost even more weight and the mass was getting bigger. Once she passed, the vet opened her (not a full necropsy) to see what the mass was. It was a very enlarged gizzard, with thick walls, but it did not seem to be...
So I ended up taking her to the vet to find out what the mass is. She did an x-ray and it doesn't seem to be a stuck egg, more likely a cancerous mass. There is no liquid in her abdomen or other signs of infection. We could do endoscopy to see exactly what is it but it is definitely out of my...
I have a Serama hen, 1 year old, that has been declining in the past 2 weeks.
She still eats, drinks, and walks around, but a lot of the time she stays in the same place looking sad, tail down.
I thought it was coccidiosis and treated her twice (tortrazuril) and dewormed her also. After...