Feed and water have to be in the hen houses or protected or wire cages tom prevent access by wild birds.
We also have to minimise visitors from other poultry keeping premises, control vermin and provide facilities for boot washing and dipping and disinfectant.
Although they were very happy to get out they were a bit disorientated and tried to nget back inside to the nest boxes they have been using. Hens have a very powerful drive to get to their chosen nesting places and will navigate complex mazes to do so.
There is a down side, the eggs are dirty because the hens now have dirty feet so eggs need to be washed.