I really am looking for a small terrier to help with my gopher and rat problem am i looking in the right direction? I have a pit bull mutt already and the new dog needs to be able to handle her. Any tips or suggestions?

I have 5 cats and the gophers fight them off

Unfortunately we do not have any dogs that we know are good at keeping gophers at bay... You may want to invest in having some feral cats that are spayed and neutered on your property that will scare them off and any other rodents you may have. We frequently have feral cats coming in that need relocating. We spay and neuter all ferals that come in to us and either release them back to their neighborhoods or to some people who want cats specifically for things like this. We would be happy to provide you with more information if you call or come in during our business hours.

A female cat will be a better mouser

I would get a cat if i were you.

Your best bet is to go in and see what they have available. Dees rescue has alot of pups too that could possible help with the rodent problem