I usually start my sit in an evening and I'm there for the overnight, when I wake up and do the feed, I'll walk them before leaving to do my dog walking appointments midday. This could be for 4 hours, where my schedule lasts longer then 4 hours I will spilt up the day to ensure they get some attention and not left for too long. After the dog walking schedule is done I'll be back in the house anytime from 2pm onwards for most of the night. Your dogs will get another walk before bed with or without my dogs as I do go home and walk my own in the evening so I get to see them. If your dog is not friendly ill just walk your dog before I run hoke to walk mine and then ill return back to your house for bedtime and we repeat it all again. The last day I usually leave in the morning but I can come back for a walk midday if needed before your return home.