Foxes reproduce once a year. Litters range from one to 11 pups (the average is six), which are born blind and don't open their eyes until nine days after birth.During that time, they stay with the vixen (female) in the den while the dog (male) brings them food. They live with their parents until they're seven months old. Vixens have been known to go to great lengths to protect their pups.
