our dog is just over a year old and shes on her own for 7 hrs a day. we walk her around the block in the morning and before bed, and when we get in at night we take her round the park for an hr or whatever, but we only take her round the block in the morning/before bed coz she wont shit in the back yard and wont eat her breakfast in the morning until shes had a shit coz shes an idiot. shes ok with that much exercise anyway, if anything she gets more tired if we’re in all day coz shes not getting as much sleep as shes used to. shes a shih tzu/poodle cross. dunno if this all helps