No bite statute, so what the owner knew decides
Vermont's only dog statute that touches bites, 20 V.S.A. 3546, is a municipal complaint procedure for a pet that bit someone off the owner's premises. Civil damages come from the common law, which summaries describe as a variation of the one-bite rule.
The chapter defines the owner to include anyone with actual or constructive possession, or who provides feed or shelter. The deadline is three years.