Retired federal research chimps head to rehab

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.

A mother chimp relaxes with her baby at Chimp Haven in Keithville, La., Feb. 19, 2013.

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.

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.

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.

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.

Two chimps walk together at Chimp Haven in Keithville, La., Feb. 19, 2013.

A chimp climbs a pine tree at Chimp Haven in Keithville, La., Feb. 18, 2013.

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.

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.

Two chimps tussle for food at Chimp Haven in Keithville, La., Feb. 19, 2013.

A mother chimp carries her baby at Chimp Haven in Keithville, La., Feb. 19, 2013.

A mother chimp relaxes with her baby at Chimp Haven in Keithville, La., Feb. 19, 2013.

A baby chimp's hands, left, is seen touching the hands of other chimps at Chimp Haven in Keithville, La., Feb. 19, 2013.