I'm sorry to hear about Maggie:hugs
It's good that you were able to have a necropsy and find out more about that tumor and get a diagnosis.
Thank you for updating your thread.
@FK1975 I'm sorry about your hen. I agree with both @oldhenlikesdogs and @DobieLover As sad as it is, since Maggie is declining and suffering, then it would be a kindness to let her go.