year-old female cheetah on indefinite loan from the Phoenix zoo. The cubs' father, however, 12-year-old Amadi, died of kidney disease shortly after the cubs' birth. The cubs will be named in a public competition on the zoo's Web site. But their personalities already have emerged. "One girl is very mischievous, while the other is very assertive," said Craig Saffoe, a cheetah keeper at the zoo for 11 years. "One of the males loves to climb trees and his brother is very relaxed." --SP 0007 Local Time 2107 GMT