http://www.sheltermedicine.com/portal/is_vsfcv.shtml http://www.sheltervet.org/default.asp http://www.animalsheltering.org http://www.cats.org.uk/index.asp http://www.aspcapro.org/shelter-medicine/feline-uri.html http://www.ufsheltermedicine.com/ , http://www.vet.cornell.edu/MaddiesFund/shelter/