Can you clarify...are you saying they're alone, but together as a pack, from 7p-7a? Or do you mean that during that time, they are in individual kennels? If they're not put in individual kennels during that time, then I would be super scared to leave him in a pack of dogs where aggression could occur.
I'm not super scared about them being unsupervised for 12 hours, as long as they'd be kenneled. Even if you had a pet service who stopped in each day at your home, they'd be alone for 12 hours+. So, it's not the time that bothers me, it's whether they'll be safe.
Have you looked into a twice a day stop-in home service? Bc that's usually about the same price as a kennel, or not much different. Might be an option so that he can stay at home.
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