Platies are not so bright - not only does anybody look like a food supplier to them , they swarm when the dog goes near their tank. Well I suppose I should train the dog to feed the fish!
Alison
google on pavlovian conditioning to see what others have used to gain çonditioned responses' from different animals. Although, you may want to refrain from using a cattleprod like some others have used to quicken the 'learning curve'.