Work the pets down the board using bombs and paint to help.
To gain enough points as needed to pass this level, use the paint cans that you build up within the game to color a large group of blocks, or join blocks of the same color together.
Try to make some of them x2 blocks (each one doubles your score for that group of blocks)
If you paint over a block the same color that the can of paint is, you get a x2