This study was approved by the animalethics
committee of Naresuan University.
The pigs were purchased from a farm in
Phitsanulok province and were 3 and 4 kg in
weight. They were killed with sharp-edge
materials from a slaughter-house and
immediately transported to the field sites.
Each pig was placed inside a metallic cage
(60 x 80 x 100 cm. with 2.5 cm. mesh) which
opened at the bottom to allow the carcasses
contact with the ground while also
preventing the carcasses from being eaten
by scavengers