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.
The half-size replica of Washington D.C.'s Vietnam Memorial Wall is sometimes called the Wall That Heals.
Bus service in Stockton is about to get faster, quieter, and cleaner. Stockton will be among the first in the nation to have all electric rapid transit bus routes.
Congressman Jerry McNerney is among those seeking to honor fallen law enforcement officers with postage stamps, using the proceeds for families of these officers.
The nation’s youngest African-American mayor of a city over 300,000 gave his first State of the City address in Stockton Thursday.
Parking meters are disappearing in downtown Stockton. A thief, or thieves, are cutting them off and making off with the change.