A little macaque nestles its head on a pigeon that responds peacefully on Neilingding Island, China.

A French bulldog plays with a 2-week-old baby Bengal tiger, which was rejected by its mother, at Shirotori zoo in Higashikagawa, southwestern Japan

A 2-week-old black panther cub, Milica, is encouraged to feed by workers in Belgrade's Zoo, July 14, 2007.

A mouse rides on the back of a frog in floodwaters in the northern Indian city Lucknow June 30, 2006.

Dema, a 26-day-old male endangered Sumatran tiger cub, cuddles up to 5-month-old female orangutan Irma at the Taman Safari Indonesia Animal Hospital, on Feb. 26, 2007

A dog feeds two tiger cubs at the Changchun Zoo in Changchun, China's Jilin province July 15 2007.

Kazo, a 4-month-old African lion cub, plays with her new canine friend, Cairo, an Italian mastiff puppy, Feb. 10, 2006, at the Wild Animal Park in Escondido, Calif. Cairo

A police dog carries a cat when ordered to, in a display of skill,