[header] How to make an outdoor dog an indoor dog as it ages [title] Start slowly. [step] If you want to make your outdoor dog into an indoor dog, you shouldn't just bring them inside and expect them to stay. You have to introduce them to being indoors slowly because they've lived their lives outdoors up until this point. 
[substeps] Try bringing the dog inside using a leash or just leading them inside. Let them stay inside for a few minutes, then take them back outside.