The fate of the state's 19 million egg-laying hens is coming to a polling place near you.

Same-sex marriage, parental notification of abortion – California's November ballot is studded with weighty issues, but none is ruffling feathers like Proposition 2, which would effectively ban farms from raising hens in cages.

The United Egg Producers predicts the measure would triple the cost of eggs, drive the industry out of the state and deprive consumers of fresh, safe California eggs.

"Californians are already reeling from skyrocketing gas and food prices," said Julie Buckner, a spokeswoman for the No on Proposition 2 campaign. "The last thing they need is to go to the supermarket and pay higher prices for a dozen eggs."

Supporters, including the Humane Society of the United States, say it would add only about a penny to the cost of an egg – and end the practice of cramming hens into cages so small they can't even turn around.

They argue the egg industry has reaped record profits in the past year while the price of an egg has jumped six cents.

"We're talking about a pretty small (additional) increase to get these animals out of these horrible, crammed cages," said Jennifer Fearing, chief economist for the Humane Society, who is managing the Yes on Proposition 2 campaign.

Fearing cites a 2005 study commissioned by the industry that concluded the cost of getting rid of cages would be nominal. Buckner said those costs were associated with chickens raised for meat – not eggs.

A Field Poll released last month showed the measure leading by the highest margin of any initiative – 63 percent to 24 percent, with 13 percent undecided.

But opponents noted that few respondents – only 16 percent – were aware of the issue. They say the polling was skewed by the measure's original title, The California Prevention of Farm Animal Cruelty Act, which has since been changed by the attorney general's office to "Standards for Confining Farm Animals."

If approved, Proposition 2 would also require farmers to increase the space available for calves raised for veal and pregnant pigs. But there is little veal production in California, and farmers have voluntarily phased out confining sows in breeding crates. Supporters say those provisions were added as preventive measures.

The focus of the campaign will be California's egg-laying hens, more than 90 percent of which are raised in cages.

Proposition 2 would require hens to be housed in a way that allows them to fully spread their wings without touching the side of an enclosure or other hens. Farmers who violate the law could be charged with a misdemeanor and face a fine of up to $1,000, imprisonment or both.

Laws banning crates for breeding pigs have been enacted in Florida, Arizona, Colorado and Oregon. But Proposition 2 is the first of its kind and would be a major gain for the animal rights movement.

The two sides are gearing up for a costly campaign battle that is drawing contributors from throughout the nation.

Supporters have raised more than $4.2 million, most of which has come from the Humane Society of the United States. Opponents, including several out-of-state egg producers, have raised $1.7 million.

California is the fifth-largest egg-producing state, after Iowa, Ohio, Indiana and Pennsylvania, according to the Agriculture Department and American Egg Board.

Both sides stipulate the initiative would end the confinement of egg-laying hens in cages in California because bigger cages would be too costly.

A study commissioned by the industry concluded that the measure would obligate farmers to build eight to 16 times more henhouses than the current system.

Proponents of the measure contend egg producers would still make healthy profits. But opponents say the measure would cost nearly 3,400 jobs and take $615 million out of the state's economy.

Ryan Armstrong, whose family has been in the egg-producing business for 60 years in San Diego County, said he would go out of business if the measure passes.

"It'll just make California more dependent on other states and other countries for eggs," Armstrong said. "We're near Mexico, which is probably the No. 1 place that we'd buy our eggs if the initiative passed."

Industry officials say the measure would also increase the likelihood of egg-associated salmonella contamination. They say hens are housed indoors to keep them from contact with wild birds and in an environment that protects them from their own waste.

Fearing cites videos of egg-laying farms that show unclean cage conditions.

"Manure is a problem when it's in such concentration as these places with tens of thousands of animals in the same building," she said.

Large concentrations of chicken manure, supporters of the initiative say, create hazardous amounts of ammonia that can endanger surrounding communities.

A report issued earlier this year by the Pew Charitable Trusts and Johns Hopkins School of Public Health called for a 10-year phase-out of intensive confinement systems such as those used to house egg-laying hens.

The report also called for tighter regulation of factory farm waste, finding that its toxic gases can sicken workers and neighbors.

Supporters of the initiative predict their campaign will overcome the opposition of egg producers.

They used 4,000 volunteers to qualify the measure, collecting nearly twice as many signatures as necessary.

"We will spend what it takes to win," Fearing said. "We have a significant grass-roots force that they don't have."

Call Aurelio Rojas, Bee Capitol Bureau, (916) 326-5545.