[Lukongsimi]

Unless the dog is familiar with the person who put the dog there. I dont think so. The dog is a German Shepherd and may bite to protect herself.

Maybe the 14 floor flat owner is the babysitter or the owner of the dog. The dog may have urinated in the living room or barking too much to the annoyance of the owner that landed him in the ledge as punishment.  Did SPCA acertained the real owner?

Maybe both neighbours are enemies 
 
Happened saw his dog wondering around so throw dog at ledge?
Gave food to make dog sleep can’t bite