The wild population of Mexican gray wolves in the southwestern U.S. is still growing, but environmental groups are warning that inbreeding and the resulting genetic crisis within the endangered ...

Only two of the 12 pups are known to have survived. If those two pups survive to age two and successfully reproduce, their pups will be significantly less inbred than almost every other wolf in the ...

Mexican wolf fertility and pup survival have been documented to decrease from inbreeding, but the Service’s artificial feeding of wild wolves increases their fertility and pup survival rates without ...