If it was a shelter, they should take Reba back.
Just curious, as I know laws and rules differ everywhere - but is an adopted cat required to be returned to the shelter, just as a purebred has to be returned to the breeder if there are any troubles?

Reba is an older cat - maybe less likely to be adopted from the shelter. If she has a furrever home instead, that is great.

But,there might be rules about this, so I just wanted to know.