As a final update to this thread, unless something big happens. I wanted to mention that Louie, the gander, was ostracized by the rest of the geese in the flock after Jill's death. He mostly stayed by himself, but within sight of the group. For a couple of weeks, he constantly called and looked for Jill and even went to other sides of the lake where he never goes. But, his health and energy was really good. One bad thing is that he began to harass the poor ducks, herding them around and nipping at them.
Last Wednesday, Louie looked like he was going to be allowed back in the group and was swimming close to them. But, on Friday, he had disappeared without a trace. I thought I saw him across the lake, possibly looking for Jill, but couldn't be sure. Well, today he was still missing, and I saw a lot of feathers spread out around the reeds near where all the geese sleep. This might mean that his life has ended. I think he was more than 20 years old and may have died in his sleep during a cold rain storm. Louie was fairly tame and would eat out of your hand if he liked you, but he was often suspicious of people he didn't know, so I'm not suspecting that anyone stole him. There was one goose that got stolen during the holidays a couple years ago.
I remember when Jill disappeared when I first posted to this thread and she showed up later. I'm hoping that Louie will, too, so if I see him again, I will let everyone know.