Foxie isn't a pet in the Verros universe, she's Kappa's sidekick, but still. (to see a previous picture I've done of Foxie, see here: https://www.weasyl.com/submission/128734/kou-family-portrait). As for her species, she's some combination of various canine breeds.
Since Foxie is a person, not a pet, in the world she inhabits, she wouldn't wear a collar. If required to by law, she wouldn't care to express any sort of individuality with it--it would be purely utilitarian. So, her nameplate is just a regular brass circle and the collar is a plain black. That's all.