Winnie was euthanized today

My 5 year old Rhode Island Red Winnie had to be euthanized today. She had some runny yellow icky poop for awhile with a crusty butt. It didn’t seem to slow her down and none of my 5 other chickens had this problem. The last two days she slowed way down and wasn’t eating much and her poop was basically clear liquid. Got into the avian vet today and she saw and felt a hard mass. Here is the xray. If anyone with experience can take a look… does this look like reproductive cancer? Vet assumed it was and figured there wasn’t much we could do. I’m sad.