The celebrity DJ's 60-pound bulldog Cadillac is alleged to have set upon Farnouche Kamran’s three-pound Tiger in the hallway of their LA apartment building.
The lawsuit says Kamran was also attacked, sustaining injuries to her head, hands and arms.
In legal documents obtained by TMZ, Kamran has accused Cadillac of attacking other animals and their owners, before the fatal attack in August.
Kamran names the landlord and bosses of the West Hollywood building, as well as Ronson.
In addition to the six-figure sum, she is seeking medical expenses and punitive damages, citing charges including negligence, assault and battery.