Hi EJ my collection of pygmy marmosets live in the south. They have a heated indoor run leading to a converted lean to green house. Giving them some protection from the local cats that are always passing through the garden. As the nights get colder i shut the hatch connecting to the outside run and open it up in the morning. They are outside on all but the coldest days and mine are very nosy hanging off the wire to see whats going on if they see or hear anyone nearby.