A "hoarder" is a person who collects and keeps many things, often to excessive and disorderly levels. They have difficulty getting rid of items, even if they are no longer useful. Full definition
A second chance has been given to 63 dogs who were living in horrible conditions at the home of hoarders in Kansas. (shelterme.tv)
There are plenty of hoarders in limited number communities, they just do it in secret, while perfectly good homes and pet parents are denied great pets. (itchmo.com)
Many of the cats come from the streets of inner cities, and others from hoarders with too many cats to care for. (spayitforwardnfp.org)