West Milford Animal Shelter The West Milford Animal Shelter is the only animal shelter in NJ that is operated completely by volunteers. All volunteers are members of the West Milford Animal Shelter Society (WMASS). WMASS volunteers donate over 1,200 hours per month at the facility and have established a trusting and caring environment for the over 1,000 animals that arrive at our shelter each year. Our annual adoption rate is around 80%.