Thanks for all the nice comments everyone.
Samantha is 15 years old remember so she is very good with the gerbils and our parakeet too.
She used to catch mice outside in her younger days but hasn't caught one in years.
She is kind of like a grandma to the little critters, which is good because she is not good with other cats. She likes to be the only cat in the house.

Cataholic, I had you in mind when I made up the title. I knew I could get you again.