I moved my cats into the main part of the house , and did n't let them into the master bedroom . After a day they were totally comfortable with the new place . Then the next day we moved my boyfriend 's cat into the master bedroom and gave him a day or two to get used to it . He was howling and meowing , and I was shocked when my cats did n't care at all .

Answer the following question: Why are the cats initially uncomfortable with their domicile ?
None of the above choices .