I am nervous because Biddy & Tucker have never been left alone for long periods of time. My boyfriend is home with them during the day. He will be starting a new day job soon (the same 9-5 hours that I work) and they will left home alone all day. They have the whole apartment, food & water, pee-pee pad, toys, etc. but I am still nervous that they are going to kill each other when left alone...