Help! Hen has bulbous swelling

[Tookie]

Went to the vet. So yes she certainly has a reproduction issue- likely EPY. As it was advanced we elected to have her euthanized rather than do all sorts of procedures and interventions. Could not have ever let her suffer more with such a bad prognosis. Thanks for the replies and advice. I learned a lot and know better the signs to look for in the rest of my girls.

I'm sorry for your loss.