"Lawmakers are realizing that targeting dogs based on their breed or what they look like is not a solution to dealing with dangerous dogs," said Lisa Peters, a spokeswoman for the American Kennel Club.
Seventeen states now have laws that prohibit communities from adopting breed-specific bans. Lawmakers in six more states are considering similar measures, and some cities are reviewing local policies that classify pit bulls as dangerous animals.
Pit bull advocates hail the changes as recognition that breed-specific laws discriminate against dogs that are not inherently aggressive or dangerous unless they are made to be that way by irresponsible owners.
The dogs' foes complain that their message is being drowned out by a well-funded, well-organized lobbying effort in state capitols. The debate puts millions of pit bull owners up against a relatively small number of people who have been victimized by the dogs.
Ron Hicks, who sponsored a bill in the Missouri House to forbid breed-specific legislation, said he was surprised when nobody spoke against his proposal last month at a committee hearing.
"I figured a few parents would be there who would bring tears to my eyes," the Republican said. "Would it have changed my opinion or what I believe in? No."
A version of Hicks' legislation was endorsed by a House committee last month and needs to clear another committee before a full House vote. The state Senate is considering a comparable bill, as are lawmakers in Utah, South Dakota, Washington, Vermont and Maryland.
In Kansas, the communities of Bonner Springs and Garden City repealed their pit-bull bans earlier this year.
Summer Freeman did not know there was a ban when she moved to Bonner Springs last year after a divorce. She panicked when an animal-control officer discovered her pet and told her she had 15 days to get rid of the dog named Titan or move out of town.
"I think of him like my son," she said. "He's my dog-son, I guess you could say. He's at my hip all the time. He's just a big baby that wouldn't hurt a fly."
Freeman was forced to leave Titan at a shelter in Lawrence for nine months until she successfully fought to overturn the law in January.
For dog owners and pit bull opponents alike, the battle is as deeply personal as any gun-control or religious issue. Each side accuses the other of lying, exploiting emotions and using bullying tactics.
Pit bull owners insist their dogs are harmless, loving family members that shouldn't be blamed for something they didn't do. To opponents, they are a volatile breed whose genetics drive them to kill more than two dozen people in the U.S. each year, many of them young children.
Popular television shows such as "Pit Boss" and "Pit Bulls and Parolees" on Animal Planet glorify the animals and minimize the tragedies that occur when pit bulls turn on humans, pit bull opponents say.
"Everything is telling us these animals are safe if you raise them right," said Jeff Borchardt, an East Troy, Wis., man whose 14-month-old son was mauled to death a year ago by two pit bulls that tore the child from the arms of their owner, who was baby-sitting. "My son's dead because of a lie, because of a myth. My life will never be the same."