If these were somehow "rescued", as little poults, and kept in run and provided commercial feed (though limiting human contact) what you have are pretty much domesticated - Easterns? By Spring they'll be very domesticated.
A Wild hen clues her poults about where and what to forage and when and what to run from/avoid. This "learning" is pretty much set in stone by a month of age. Imprinting on humans and/or being provided for by humans during that time (and past that time) pretty much makes them sitting ducks when "released", i.e., "domestics".
Something else to take into account is your State laws regarding holding/maintaining "Wilds" in captivity.,
If these are Domestic Easterns, purchased legally, then allowing those to "go free" is also releasing sitting ducks into predatorville.