I volunteer at the Humane Society, and because of their lack of resources/space and their policy of accepting any animal that is dropped off, they do enthanize those animals who are sick or aggressive, unfortunately. However, they would not enthanize a healthy, adoptable kitten. Also the staff and volunteers, including myself, take time to give all of the animals warm and friendly human contact. It was just a suggestion in case keeping the kitten at your home with your other cats wasn’t an option. If you don’t agree with the Humane Society’s policies, there are other rescue organizations that would probably take the kitten (WARL, for example). Regardless, thanks for taking in the kitten and hope it gets a forever home soon.