Messina took his father's recipe for certified organic pest repellant and brought it to market in 2001. A change in the name and packaging (a non-aerosol spray that's easier to pump) resulted in 60% growth in 2005. MessinaWildlife products use natural plant extracts instead of harsh chemicals to keep rabbits, squirrels, and deer at bay.

Age: 30
Location: Washington, N.J.
Revenue: $1.1 million
Employees: 7-9 (depending on season)