Getting a dogsitter/walker is acceptable, but surely if you get a dog what is the point paying someone else for something that you should be doing and what is part of looking after a dog? it makes no sense to me, I work part time, but I make certain that I myself get home to walk my dogs during the day, I wouldn't want anyone else to do it, someone has said that they are not human, of course they aren't but that means they don't think like humans, so do not learn that their owner is coming home, for all they know when you go out that door in the morning they may then have to fend for themselves, they do not know you are coming back, if you look on the RSPCA website they recommend 4 hours to be the maximum time a dog should be left, they also say that if you work full time then a dog is the wrong pet for you, however you say you have a dogsitter come in so that cancels that out, but you are missing out on a lot of quality dog/human time, especially as your dog is effectively still a puppy.