According to Capt. Khanyisile Zwane, Middelburg police spokesperson, the boy was visiting his girlfriend when the alleged incident occurred.
Neighbours discovered the boy asleep, with a condom still pulled over his penis. The lifeless body of a small framed dog was lying next to him.
The boy was arrested and will appear in court on Monday on a charge of bestiality.
The dog was removed by die SPCA and taken for a post mortem to gather evidence for the case.
Read the Tuesday edition of the Middelburg Observer (on sale on Monday afternoon) for more information and photos.