Jolly is 8 months old. Starting at 6 months old, I have tried a few times to leave him free in the house with the adult dogs. I have been gone between 1-3 hours. Every time he failed the test.
His favorite activities have been: digging all the dirt out of the house plants and spreading it all over the floor, chewing up all my decorative pine cones and his newest game, pulling all the paper towels off the towel rack and chewing them into little bitty pieces. All his hobbies have been easily cleaned up with a broom, but have proved that he is far from ready for this privilege.
The adult dogs range in age from 2.5-4.5 years old. They are reliable in the house while I am gone. Merry is the youngest of this group and she has been well behaved in the house while I am gone since she was 18 months old. They have a dog door to a fenced area, so they let themselves out when they have to relieve themselves or just to bark at the wildlife. (I live in the country).
Charleen and Cav's: Pippin (ruby male), Merry (b&t female), Luke (blenheim male) & Jolly (tri male puppy)