I do a "trial and error" method. If my first paths do not deliver all the pets, I click reset and try again. I have made it to level 20 this way. HOWEVER, I wonder if trial and error is what is wanted by the people who made the game. I wonder if our brains can learn to SEE the paths. I wonder if there are people whose brains see something I am not seeing; something which makes the paths clear. I would like to know how the game is plotted out I guess. That would show the reasoning used to put the pets in their spots. Anyway, trial and error (persistence and tenacity) and the reset button brought me to level 20.