This video shows you one way to achieve 100% Total Destruction on Angry Birds Surf and Turf level 3. If you have an alternate strategy please feel free to leave a detailed comment below.
Use the first Yellow bird to take out the support of the left structure. Use the next bird to clean up all resulting debris. Then knock over the right tower with the next two birds, acting quickly. Loft the Sardine Can to land on the small ice blocks in the bottom-right.