There are a few things you can do to make your house smell good with birds. First, make sure to clean their cages regularly. Second, use air fresheners or scented candles in bird-friendly fragrances like citrus or lavender. Third, try putting a bowl of fresh fruit out for them to eat. Fourth, consider using an essential oil diffuser with calming oils like chamomile or eucalyptus. Finally, keep your windows open to let in fresh air and sunlight.