Common law, not a statute
Mississippi is one of the states with no dog bite statute, so courts apply the old scienter or “one-bite” rule: the victim must prove the dog had a dangerous propensity and the owner knew or should have known it beforehand. The knowledge doesn't have to come from a bite — growling, lunging and repeated complaints can show it.
A second route is negligence. Dog bite law commentators note that violating a leash law or a rule against dogs running at large can support a negligence claim without any history of aggression. Under Miss. Code §11-7-15 your own fault only reduces the damages. Noneconomic damages are capped at $1,000,000 under §11-1-60.