Shortly after I got an apartment due to my divorce, a friend moved into an apartment due to her divorce. Her apartment wouldn't allow her to bring her 2 parakeets, so I fostered them for a while.
I tried letting them out of the cage, but my dog wouldn't let them land anywhere except my head.
They never had eggs for however long she had them, but they did with me. I figured out it was because my apt was fairly dark except in the evening. The first egg didn't hatch. I put in nesting material and a small box. The next 3 eggs hatched.
I taught the male to whistle the song from Andy Griffith/Mayberry. Well, I taught them both, but he learned it.
They kept having chicks after she took them back when she got a different apartment.