I remember you saying something about how Fila's run like a cat? I was watching my pup run the other day and remembered. How did your fila's run? My pup when using slow pace run he was moving side legs at same time in synch. When running a bit faster he went to a trot where his rear paw would hit the same spot his front paw left at the same moment. So his paws were synched just not paralel but diagonally. when he switched to full run, he put his front and rear legs together and made huge leaps. Funny thing he can catch grey hounds with ease, believe it or not.