The bird flu made restrictions in the Netherlands: all hobbyists with poultry have to coop them up in a coop/run now to avoid contact with wild birds.
My run is big enough to keep 5 small and 3 bigger bantams (15m2) inside if necessary, but I let them free range a few hours each day if possible, until I get a warning/visit from an enforcer.
This is important IMo , to keep them healthy and happy. Whats a better precaution against sickness than happy chickens who search their own fresh food?
My moulting /oldies flock. Lots of feathers but no eggs at all last week.