Among the many animals who need homes are those that are considered "unadoptable" due to old age, illness, or disability. While people who are looking for a long-term companion pass them by, some folks know those pets deserve to be cared for as much as any animal. Those are the founders, volunteers, and donors of specialized shelters that offer a home for the rest of the pets' lives. We saw a few of them in an earlier post, http://mentalfloss.com/article/90404/10-animal-retirement-homes and here are more animal retirement homes you should know about, in another list I compiled for mental_floss.
(Image credit: Old Friends Senior Dog Sanctuary)