Eazy Dog Training Puppy Schools in Sydney: Puppy Training in Marrickville. I'm  a puppy school teacher in Sydney, running puppy schools in Leichhardt, Marrickville and Newtown. Every once in awhile I get asked why a puppy is acting up. This is never the case. Dogs don't have a theory of mind so they don't plan their actions ahead just to annoy you. But there is a problem - and it's a lack of follow through!