How about GIRL?
What a old farm cat that adopted us and had a litter of kittens. We got rid of all of them but kept one, a male. We had to take them both to the vet, and at the vets they asked their names...we told them the momma cat was called momma kitty and we called the baby cat baby kitty.
So what you expect from me LOL.
We had a dog like yours and we named him Rocky.Female would be Rockette.