AP Photo/Gerald Herbert
An adult chimp plays with a young chimp at Chimp Haven in Keithville, La., Feb. 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 relaxes with her baby at Chimp Haven in Keithville, La., Feb. 19, 2013.
AP Photo/Gerald Herbert
A mother chimp holds a piece of lettuce in her mouth as she carries her baby at Chimp Haven in Keithville, La., Feb. 19, 2013.
AP Photo/Gerald Herbert
In this three picture combo, a baby chimp shows a variety of expressions as it sits in its mother's arms at Chimp Haven in Keithville, La., Feb. 19, 2013.
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, Feb. 18, 2013.
AP Photo/Janet McConnaughey
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., Feb. 19, 2013.
AP Photo/Gerald Herbert
Two chimps walk together at Chimp Haven in Keithville, La., Feb. 19, 2013.
AP Photo/Gerald Herbert
A chimp climbs a pine tree at Chimp Haven in Keithville, La., Feb. 18, 2013.
AP Photo/Gerald Herbert
Adrienne Mrsny, an animal care specialist, feeds chimps in a section reserved for HIV infected chimps at Chimp Haven in Keithville, La., Feb. 19, 2013.
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., Feb. 19, 2013.
AP Photo/Gerald Herbert
Two chimps tussle for food at Chimp Haven in Keithville, La., Feb. 19, 2013.
AP Photo/Gerald Herbert
A mother chimp carries her baby at Chimp Haven in Keithville, La., Feb. 19, 2013.
AP Photo/Gerald Herbert
A mother chimp relaxes with her baby at Chimp Haven in Keithville, La., Feb. 19, 2013.
AP Photo/Gerald Herbert
A baby chimp's hands, left, is seen touching the hands of other chimps at Chimp Haven in Keithville, La., Feb. 19, 2013.