THE PILOT STATED, 'I DID NOT GET LINED UP FOR TAKEOFF THE WAY I SHOULD BECAUSE OF THE DOG CHASING THE PLANE... THE PLANE WAS GOING SLOW AND AS I NEARED THE END OF THE RUNWAY MY RIGHT WING TIP HIT A TREE.' ACCORDING TO AN FAA INSPECTOR, DURING THE TAKEOFF ROLL THE PILOT'S DOG RAN IN FRONT OF THE AIRPLANE. THE PILOT LIFTED OFF PREMATURELY TO AVOID HIS DOG AND THE AIRPLANE COLLIDED WITH TREES.