Is rookie a name for female dog?

"Rookie" is not traditionally a name for a female dog. It's more commonly used for male dogs.

While you can certainly name a female dog Rookie, it's not a typical choice for a female dog. You may want to consider other names that are more traditionally associated with female dogs, like Bella, Lucy, or Daisy.

Ultimately, the choice is yours! If you love the name Rookie and think it suits your dog's personality, go for it!