Our strategy for Ham ’em High level 12-11 is to launch the first Yellow bird into the left side of the tall horse, popping both pigs on that side. Loft the next Yellow bird, accelerating through the left side of the second horse. Spin the Boomerang bird into as many of the remaining pigs as possible, then use the White bird to bomb any scraps. The score in the video below is 73,330.
Method #2 yields 78,150 using 3 out of 5 birds. Fire the first Yellow bird into the small stone block atop the tall horse, thereby popping the three pigs at the extreme right. Launch the next Yellow bird into the left side of the tall horse, popping both pigs on that side. Then spin the Boomerang bird into the only remaining pig.