On Friday the 13th, the superstitious may be knocking on wood, crossing their fingers and keeping an eye out for black cats in their path to avoid bad luck.

But the Pasadena, Calif., Humane Society and SPCA has launched a promotion that it hopes will help to encourage prospective animal adopters to overlook their superstitions toward the supposedly ill-fated felines.

Starting today, cats with black and partially-black fur can be adopted from the shelter for just $13, down from the usual $70. The promotion will be available on the 13th of each month.

According to the Pasadena Humane Society's website, the $13 adoption fee includes a spay and neuter surgery, a microchip implant for identification purposes, the feline's first set of vaccinations, as well as a second health visit at a participating veterinarian and a free health and wellness exam at an eligible animal hospital.

"These cats and kittens are just as affectionate and adorable," said adoptions supervisor Kevin McManus on the California-based animal protection organization's website. "Unfortunately superstitions about black cats make it harder to adopt them out."