PaintingAnswer
The Hidden TigerThe Tiger’s stripes spell out the title of the painting.
DreamThe outline of the barn door, an old tire, some chicken wire, and other items make the shape of an old jalopy. 
Ten FriendsThe missing “friend” is a Zebra hidden in the garments and shapes of the six figures on the left.
DeerThe trees and branches above the deer form the shape of a large antlered buck.