A clinic dedicated to the veterinary needs of the homeless will open Saturday, Feb. 13, in downtown Sacramento. Started by UC Davis students and alumni, it is believed to be the first organized health-care effort for animals belonging to homeless persons in the state and one of the few such programs in the country. Named after an extraordinarily empathetic character in a popular science fiction book, the Mercer Veterinary Clinic for the Homeless was conceived when UC Davis veterinary students Randall Singer and Dori Borjesson read an article about a similar effort in Seattle. "Animal welfare is the key issue," says Singer, who believes that companion animals are so important that some people may choose the animal over shelters and subsidized housing that forbid animals. The group will open the clinic on the second and fourth Saturdays of every month, from 8 to 11 a.m, at the old dining hall of Loaves and Fishes. Staffed by volunteer veterinarians as well as other community volunteers, the clinic will provide free veterinary care that does not require the use of general anesthesia -- vaccinations, physicals and basic medical treatments. Also, at least 10 veterinary hospitals in the region have agreed to provide emergency care and more extensive services to referred clients of the clinic at the cost of supplies. The clinic is funded by donations and in-kind contributions.