My 3 girls are about 6/7 months old now and have been laying for several weeks. We have 2 perches which are higher than the nesting boxes. My 2 biggest girls sleep together on one perch and until last week littlest one LV did also but we notice she is now sleeping on the floor beneth the other 2. Should we pick her up and put her on the perch or is she ok to sleep on the floor? Thanks for your time. Sarah.