Most Helpful Girl
If you’re dating a female canine your committing bestiality and I’m pretty sure that’s illegal in most places. If you’re dating a woman and you’re calling her a bitch then I’m assuming she doesn’t have sex with you every time you want it and no, the only person who should be addressed with a derogatory term is you.
Most Helpful Guy
If you are a dog commenting and your girlfriend is also a dog but of the female variety... then the English vocabulary would say yes she is sir poodle mate.