I was able to come home at lunch and take my doberman out when he was pup. When he was 9 months old I got transferred. I hired someone to come and take him walking, hiking, ball playing at lunch. Even though he was old enough to stay alone I didn't want him alone for 9 hours.
My doberman puppy was very hard to deal with and I'm a very experienced dog owner. He was the hardest puppy by far. He is an independent thinker which means..."hmmm maybe I don't have to do what you say, I'll do it my way." He was very active and boisterous. When hiking with friends often he would "brush" into someone and knock them around as he ran by to check on me. My friends were very good sports about it though.
I have a 6 month old collie puppy now. Just recently I stopped having a pet sitter come by at lunch. I get up at 4:45am to feed the pup and Eli so I can take them to the park an hour or so later and give them a good run and do a little training, they both have to have that free run then because I leave at 7:20am and hubby leaves at 7:45am and we don't get home until a bit after 5:00pm. My puppy has a very large 30x40 run area that has a dog door going into a climate controlled bird room. I have sectioned off half of that room for the pup with his bed (not a soft bed but a Kundura bed type cuz like most puppies he chews up the soft cushy beds), water and many toys. He can go out and in when he likes. He is separated from the doberman during the day, but through part of the fence they can see each other. The doberman has a dog door that goes into the house, he is a wonderful house dog but again not until he was over a year.
I train at least two nights a week after work in class and have a Saturday class right now also. Even though my doberman is well trained I have an instructor who loves the dobe so I get to bring him as demo dog and I can work him some. He will be 4 in December. He is a great dog now but it took YEARS of training and consistancy to develop him in to the fabulous dog he is. He recently passed the inital therapy dog test and is taking the final test in December. Dobermans, for the most part are very active dogs! He was much more active than my collie puppy when he was the same age. However puppies need to be watched at all time in the house, even my collie boy because they chew or steal. Collie puppy will try to chew dog beds out for the other dogs in the house, he will steal dish towels, paper, napkins, he always seems to manage to get this little velvet bag my husband uses for his zip drives, he LOVES that darn bag and hubby has to remember to zip the computer bag so pup can't get the zip drive stuff, husband felt he should be taught not to get that bag but he is a puppy and good behavior comes with training and TIME. Geesh you name it, the pup is a thief and he has to be watched, just like the dobe when he was a pup only where this pup takes stuff, Eli chomped it!
I also want to mention that I come home every evening and it is rare we go out during the week because I feel the dogs need us since they have been alone all day. Last night I took the pup and Eli to Home Depot and Lowes as we were checking out some items. Thursday we are meeting friends for dinner and a movie but I made sure dinner wasn't until 7:00pm because I have to exercise the boy before we leave. I don't even want to, that is how weird I am about doing what I feel is right for the dogs...still one needs to have friends. So if you begin dating you will still have to deal with the puppy/dog before your own needs. It can be a drag sometimes, worth it to raise well mannered, loving, responsive animals but a drag if there is something you might want to do that isn't dog related. I so wish I could come home for lunch, it would make my life different, this is the first puppy I've had where I couldn't come home at lunch and feed/play/hike with puppy.
Editing here because I see you have agreed to look at adult dogs. LOL Well see...