The SF SPCA has a very informative website. They have an adoption center, spay/neuter services, volunteer opportunities, pet care training classes, etc. The adoption database is searchable and includes searches of other shelters in the area.
Find the right breed for you. A wealth of general dog owner information, dog health data, dog rescue resources, and interesting dog books and web sites
Important info about the anatomy of the knee joint, with details about the surgery, risks and recovery. Great info for anyone considering this procedure for their dog.