'Love and Hip Hop' Star -- I'll Fight Princess ... in Ray J Dog Fight

The war between Ray J and Princess Love over their little pooch, Boogati, just escalated ... now Princess' arch enemy wants in on the dog fight -- and says it could get violent.

We saw "Love & Hip Hop Hollywood" star Teairra Mari -- with co-star Nikki Mudarris -- coming out of Mr. Chow Tuesday and asked about the nasty breakup between Ray J and Princess ... and their fight over their pet Maltese.

There's already bad blood between Teairra and Princess -- after their epic battle over Ray J on the TV show. Teairra made it clear... she'll get physical if that's what it takes.