Things that each puppy should have been exposed to by the time s/he reaches seven weeks old:

1. Seven different types of surfaces: Carpet, concrete, wood, vinyl, grass, dirt, gravel, wood chips.

2. Seven different types of play objects: Big balls, small balls, soft fabric toys, fuzzy toys, squeaky toys, paper or cardboard items, metal items, sticks or hose pieces.

3. Seven different locations: Front yard, backyard, basement, kitchen, car, garage, laundry room, bathroom.

4. Seven new people: Children and older adults, a person with a cane, someone in a wheelchair or walker.

5. Seven challenges: Climb on a box, climb off a box, go through a tunnel, climb steps, go down steps, climb over obstacles, play hide and seek, go in and out of a doorway with a step up or down, run around a fence.

6. Seven different types of food containers: Metal, plastic, cardboard, paper, china, pie plate, frying pan.

7. Seven different eating locations: Crate, yard, kitchen, basement, laundry room, living room, bathroom.

Of course, seven shouldn’t be a limiting number. Breeders should be exposing puppies to 100 different people before they leave at 8 weeks.