That many dogs in a small room with only one person watching them already does not sound like an ideal situation. Them getting left alone ever is even worse.
Can you have someone (a dog walker/pet sitter or a friend) come and let your dog out/play with him on the days you have to be gone 10 hours, or maybe go home for lunch?
Jubal/Tesla (Beauceron) 3/14/14
Bianca HIC CGC TT (GSD) 4/24/04-10/23/12