My OH and I work F/T and we successfully managed to raise Molo as a pup - with the help of flexi-time, staggered lunch breaks and pet sitters
It CAN be done - it is incredibly hard work at first, and requires significant investment both in time and money (pet sitters and take-outs when you are too tired too cook
).
We took staggered time off work when he arrived, so he had a month to settle in; by which time he was happy to settle for a hour or two twice a day - with visits from me, OH, and a pet-sitter several times a day for wee's, play and training
As he got older, we gradually increased the time between visits - and now, we manage without a sitter unless one of us is working away