I live in an apartment and when I'm away or busy doing work in another room, I feel bad for the dog because there is nothing really for him to do. He doesn't have much interest in his toy (I should find some new ones) and he doesn't have I know it would bug me to be locked inside for most of the day in a quiet room, but I also know dogs are not humans. Should I leave the TV on for him or put some ambient noise on the speakers? If so, what ambient noises are good? Suggestions?