We recently moved our 2 Siamese cats (inside/outside cats) to a new home after 8 years. Wanting to acclimate them to their new surroundings, and to not lose them by letting them outside at first, we have kept them inside at night, and only let them outside during the day for brief periods. (it has been one week now). At night, they both howl a guttural sound incessantly all night long, scratching and clawing at the doors to get out. Will this end after time? What do we do?