The plaintiffs say the "shelter has a duty to help, not harm, homeless dogs and cats."
The Animal Legal Defense Fund along with three people from Stockton filed the lawsuit against the City of Stockton.
The suit is not asking for money, only that the animal shelter follow the law.
The shelter is required to hold strays for at least 6 days before euthanization.
But Animal Legal Defense Fund Attorney Jenni James says the shelter's records show a different story over a one year period.
"Early euthansias are happening, 1,500 animals were euthanized before the expiration of the Stockton shelter's minimum holding period," says James.
James says 80 percent of the animals are behind locked doors where the public never sees them.
"Only about 20 percent of the animals are truly being given a meaningful chance of adoption," says James.
The City of Stockton is not commenting on the lawsuit.
If you park in downtown Stockton you won't have to worry about running out of time on your parking meter. Starting Tuesday you can use your cell phone to "feed the meter."
Rows of corn, eggplant, and squash grow in an urban garden in Stockton, providing food for more than two dozen families. Organizers hope it's a model for future urban gardens throughout the Central Valley.
Some California prison inmates are getting special training behind bars. Rich Ibarra reports they're learning to train service dogs.
The family of a hostage killed in the chase that followed a bank robbery in Stockton last year has filed a wrongful death suit.
It's predicted that average gas prices around the U.S. may fall as low as $2 per gallon by Christmas, but northern California drivers likely won't see gas that low.