A Question of Adoptability
We get a lot of cats. We get a lot of black cats. They outnumber any other color and they are hard to place. People just seem to pick every other color first. We get many really nice, friendly socialized cats and kittens that are easier to find homes for than timid or less friendly ones. And we don't have enough foster homes that can take a mother cat and kittens so that they can be protected from the all too contagious upper respiratory disease that we fight every day.
This unlucky family had all the chips stacked against them and were killed.