How can I get past the wolf

Hint 1 of 7:

EXAMINE under the wolf's tail.

Hint 2 of 7:

EXAMINE glint ( the moving thing under the tail) - wolf is electronic.

Hint 3 of 7:

Short it out with water from the lake.

Hint 4 of 7:

Did you TAKE plastic bag from waste-paper basket in the Present office?