Proposal calls for risk tiers, certified handlers, muzzles or possible confiscation of highest-risk dogs as authorities review fighting-dog rules.

Fatal attacks by two large dogs in a week have sparked concern over public safety guidelines and the deterrent effect of current laws.

Proposal calls for risk tiers, certified handlers, muzzles or possible confiscation of highest-risk dogs as authorities review fighting-dog rules.

Authorities investigating latest attacks, which come amid mounting safety concerns after two other deadly incidents last week.