Finding sweets in the house (2)

Hide some dry dog biscuits through the house out of sight of your dog: under chairs, under cushions, next to boxes, on tables, …
Then let the dog in again and start walking around as if you were looking for something. Encourage your dog by asking, “Where is it then? Where is it going? SEARCH!”
Make sure that you do not show the biscuits yourself to the dog, but bring it near the sweets and let your dog find the reward. If your dog has found the biscuit, you praise him exuberantly, after which you start walking around again. You can also hide a super reward here and there such as a piece of chicken or a stuffed kong.