Ms Banks said the production cost of barn eggs was only slightly higher than the colony system so the cost difference to consumers would be minimal.
"However, the life quality of the chicken is considerably better," she said.
Egg Producers Federation chairman Michael Guthrie has previously said the colony system had been extensively trialled and proven to be effective.
"Colonies not only meet the requirements of the law, but they achieve what we would all regard as desirable - the opportunity for birds to indulge in natural behaviours such as nesting, scratching, perching and spreading their wings."
The Federation also wanted to ensure eggs remained affordable during tough economic times, he said.