Here are some websites to get you going. I am sure everyone of these groups could tell you horror stories. Good Luck
Yorkshire Terrier Club of America
http://www.ytca.org/
Humane Society of NY
http://www.humanesocietyny.org/
ASPCA
http://www.aspca.org
Prisoners of Greed
www.prisonersofgreed.org
MillBusters
www.millbusters.com
PETA
www.peta.com
Hearts United for Animals
http://www.hua.org
Rescuers World
http://groups.msn.com/RescuersWorld/yourwebpage.msnw