We've had our chickens a week now, they are putting themselves in the house at night but only 1 of the 3 roosts. The other 2 snuggle up in the nest box Do I need to lift them out and put them on the perch? Am worried that they've not got enough room on there? also don't seem to be eating much, other than the garden have been giving pellets and then corn later in day - they don't seem too fussed?