One strategy for Angry Birds Facebook Pig Tales level 13 is to fling Orange bird high above the first tower so that it lands on the small square wood block (sweet spot alert) in the right structure. The bird should slice through, and destroy all the pigs on the right. Finally, send Terence directly into the first tower to clear the remaining pigs.
Our Angry Birds Facebook walkthroughs show you how to obtain 3 stars, most of the time without the aid of Power-Ups (we do make exceptions). If you have a different strategy feel free to leave a comment below; however, don't just post your score via the comments, as that's what the Facebook leaderboard is for.