SSD breeds, raises, trains, and places assistance dogs to support people with disabilities to live full lives in the community. Misiunea: Susținerea și protejarea copiilor în situații de risc, să fie valorificați ca membri Keystone Service Systems (KSS) provides comprehensive community services in the areas of mental health, intellectual disability, autism, and Head Start, in Pennsylvania and Delaware. Susquehanna Service Dogs, a Keystone agency, trains and places assistance and therapy dogs with children and adults. Keystone Service Systems is a subsidiary of Keystone Human Services Inc.