Bernard Rollin, a Colorado State University professor who teaches both philosophy and animal science, said he expected increasing numbers of meat-eaters to join the ranks of those demanding changes in the way pigs are housed at many large facilities.
"You have to have ideological blindness to think these animals are not intelligent," Rollin said. "I hope we go back to an agriculture that works more with the animals' biological and psychological needs and nature rather than against them."
"The trouble is, we're used to seeing them as herds," he said. "You see 1,000 cows or pigs and think, 'Oh, they're all the same.' But there are actually huge individual differences."
According to Farm Sanctuary, cows become excited over intellectual challenges, chickens can navigate mazes and anticipate the future, and sheep can remember the faces of dozens of individual humans and other sheep for more than two years.
There is existing research suggesting that campaigns such as The Someone Project may make headway in influencing consumers.
In one recent study examining doubts that people might have about eating meat, University of British Columbia psychologists Matthew Ruby and Steven Heine concluded that the animal's level of intelligence was the foremost concern.
Another recent study by university researchers from Australia and Britain concluded that many meat-eaters experience moral conflict if reminded of the intelligence of the animals they are consuming.
"Although most people do not mind eating meat, they do not like thinking of animals they eat as having possessed minds," the researchers wrote in Personality and Social Psychology Bulletin.
Dena Jones, manager of the Animal Welfare Institute's farm animal program, predicted that public awareness of farm animals' intelligence would steadily increase, leading to more pressure on the farm industry from food retailers and restaurant chains.