I can leave it with you guys i.e. transport it to you. show you how to use it. Once done I collect it back from you.
I think if you are shooting dogs, you should go where the dogs and their owners gather... I know Bishan Park has an area for dogs see link
if you for people I think Orchard road is the best place... lots of traffic an tourist which may be willing to fork out some $$ to help. Challenge is to get clearance from the authority.