A mother chimp holds a piece of lettuce in her mouth as she carries her baby at Chimp Haven in Keithville, La., Tuesday, February 19, 2013. One hundred and eleven chimpanzees will be coming from a south Louisiana laboratory to Chimp Haven, the national sanctuary for chimpanzees retired from federal research. (AP Photo/Gerald Herbert)

Chimps use sticks to poke into a mock termite mound to taste a sweet substance placed in the mound by keepers at Chimp Haven in Keithville, La., Tuesday, February 19, 2013. One hundred and eleven chimpanzees will be coming from a south Louisiana laboratory to Chimp Haven, the national sanctuary for chimpanzees retired from federal research. (AP Photo/Janet McConnaughey)

An adult chimp plays with a young chimp at Chimp Haven in Keithville, La., Monday, February 18, 2013. One hundred and eleven chimpanzees will be coming from a south Louisiana laboratory to Chimp Haven, the national sanctuary for chimpanzees retired from federal research. (AP Photo/Gerald Herbert)

A mother chimp carries her baby at Chimp Haven in Keithville, La., Tuesday, February 19, 2013. One hundred and eleven chimpanzees will be coming from a south Louisiana laboratory to Chimp Haven, the national sanctuary for chimpanzees retired from federal research. (AP Photo/Gerald Herbert)

A chimp gathers food at Chimp Haven in Keithville, La., Tuesday, February 19, 2013. One hundred and eleven chimpanzees will be coming from a south Louisiana laboratory to Chimp Haven, the national sanctuary for chimpanzees retired from federal research. (AP Photo/Gerald Herbert)

The hands of a baby chimp are seen clinging to its mother as she walks at Chimp Haven in Keithville, La., Monday, February 18, 2013. One hundred and eleven chimpanzees will be coming from a south Louisiana laboratory to Chimp Haven, the national sanctuary for chimpanzees retired from federal research. (AP Photo/Gerald Herbert)

A baby chimp's hands, left, is seen touching the hands of other chimps at Chimp Haven in Keithville, La., Tuesday, February 19, 2013. One hundred and eleven chimpanzees will be coming from a south Louisiana laboratory to Chimp Haven, the national sanctuary for chimpanzees retired from federal research. (AP Photo/Gerald Herbert)

An adult chimp plays with a young chimp at Chimp Haven in Keithville, La., Monday, February 18, 2013. (AP Photo/Gerald Herbert)

Two chimps tussle for food at Chimp Haven in Keithville, La., Tuesday, February 19, 2013. One hundred and eleven chimpanzees will be coming from a south Louisiana laboratory to Chimp Haven, the national sanctuary for chimpanzees retired from federal research. (AP Photo/Gerald Herbert)

A chimp, left, identified as an 'auntie,' touches the hand of a baby chimp cradled in the arms of its mother, at Chimp Haven in Keithville, La., Tuesday, February 19, 2013. One hundred and eleven chimpanzees will be coming from a south Louisiana laboratory to Chimp Haven, the national sanctuary for chimpanzees retired from federal research. (AP Photo/Gerald Herbert)