It`s possible to increase dog`s faithfulness by improving its house. Houses are available starting from level 10. There are 12 interior items in each house, which can be improved for rubies. Maximally improved interior item increases faithfulness by 90. House image can be found in your profile under your dog`s image.
Shower, Carafe, Fireplace, Carpet, Palmtree, Phone Radio, Curtains, Standinglamp, Nighttable, Broom, Armchair