This video shows you one way to achieve 100% Total Destruction on Angry Birds Surf and Turf level 8. If you have an alternate strategy please feel free to leave a detailed comment below.
Fire the Black bird into the bottom-left of the first structure, tossing all debris to the right. Fire the Yellow bird low, through the wooden debris and into the foot of the main tower. Break some ice on the right side with the Blue bird and soften an area in front of the first patch of ice with the Red bird. Land the Sardine Can on the debris or ice.