Some Adult Family Homes in Pierce County do offer care for individuals with Alzheimer's or dementia. For a current listing:
Aging and Disability Resource Center
(253) 798-4600
(800) 562-0332
Department of Social And Human Services
DSHS offers an Adult Family Home locator by city, county and zip code.
http://www.aasa.dshs.wa.gov/Lookup/AFHPubLookup.asp
DSHS Fax Back: 1-800-372-0186