I work 8-5 with an hour lunch at noon. In the summer, the dogs (currently 3 of them) are outside before noon..fenced yard, plenty of shade, and no escape attempts. I crate Skynyrd and Sammie and leave Dite loose in the house when I come home for lunch. In colder weather I switch it to in the first half of the day and out the second. All mine are adults and I try not to leave them for more than six hours (inside or out). Surely, there's someone (relative?, neighbor?) that could drop by and check on your pup. There have been times when I've gotten stuck at work all day and have had to call around and get someone to let them in or out. My co-workers make fun of me because of my routine...I'm definitely a dog mom.