By definition, a lodger lives with a household sharing the accommodation.
There is very poor or little relationship between the lodger and members of the household.
Dogs can become very frustrated and/or lonely because of the huge gulf of misunderstandings and lack of communication between themselves and their human "pack" as the dog's calming signals are often misunderstood or ignored. It may be given sufficient physical exercise while being walked on a lead but not be allowed to sniff the environment and thereby stimulate its brain and fulfill its working instincts. For most humans, our world is made up of colours. The equivalent in the canine world is scents/smells which stimulate and activate the brain. see also sprinkles(tm)