Dog Walkers, Pet Sitters, Groomers, Trainers, Pet Care - Care.com&
I hope that link works. I googled your area, and it came up. It looks like a nice site and offers dog walking and pet sitters.
If your pup was ok, then it's letting you know it's not happy, in it's own puppy way. I'd look into trying a pet sitter or walker a few times a week or more, depending on what you can afford.
Is there a way you could do work outs from home? or add a workout that includes your pup? I'd try that too to make your time away less than 12 hrs.
Let us know if you try that link. Sometime in the future, I might need a service like this! Would be nice to hear how it is.