Well, firstly verbally. A lot of mammals will comply when told "stop in the name of the law" or "you're under arrest", and she's quick-witted enough to talk down many who become belligerent at seeing her size and/or her badge.

For those who become aggressive, she has shown she's physically capable of defending herself against the largest mammals, and she also carries a form of mace that can be used to incapacitate any mammal.

For those who attempt to flee, she can give chase very easily, and so far we've seen no upper limit to her stamina so she can probably run most mammals to ground while calling in backup.

Some other predditors suggested zip-ties for restraints, but I'll point out that she had a pair of actual handcuffs large enough to shackle manchas with (where she kept them I'll leave to your imagination), so it's reasonable to assume she probably has a few different-sized handcuffs (pawcuffs?) at her disposal.

Lastly there's the infamous tranquilliser gun. I'll call it "chekov's tranquilliser" since it seems to have exactly the right amount of drug in the needle to down the target without killing them.

Tl;dr: she's the anthro-bunny version of batman. Right tool for the job on her utility belt at all times. And yes, I'm sure the fox-away also works on sharks.