No she lives just up the road and I know the people who had them before. All really nice people and I don't want to disparage them, it's just frustrating when I try so hard to do the right thing and end up with 3 hens and these 4 old Wyandottes just keep trucking along! Must have been a really good genetic combination at the time. They were feed store chicks.Genetics plays a huge part in things. Some win the genetic lottery, some don't.
Also, are you SURE these chickens are 11 years old? Could some have died/been replaced/were living there before you moved in so you're just taking her word for it?