Thanks, Ladyhawk and Jess. At least, for now, I have no birds with any known ailments, thank goodness. Even Riley, who I was very concerned about as she was trying to come back into lay after her molt, has laid two beautiful bluish-green eggs, so she seems okay.
As Reba's body was laying next to the grave, I kept looking at her feet and legs and thinking they looked so young and should have had many more miles left of walking in them. The legs were slick-smooth, not one scale was out of place, no bumblefoot scars or anything amiss on her pads and in her old age, she'd grown a respectable set of spurs with which to keep the underlings in line.