In my opinion, 11 hrs is far to long to be leaving a dog on its own, but only YOU know your dogs temperament, will it be throwing itself up the wall with boredom, , well will it, its ok folks saying it will sleep for 90% of the time, but each dog is different, i have 3 dogs 1 will kip all day if i let her, another 1 needs lots of mental stimulation, no way would she cope with 11 hrs on her own, good luck in whatever you decide