Use the sliding column method to move your Pets to the left of the board.
In order to make a column move match at least 3 blocks (of the same color) in the column it's left.
Start by working on moving the top Pet then the middle and bring the three down together if you can.
Build up your paint booster (by making large groups of blocks on the main section of the board)
Use the paint to create more of the one color blocks to help the Pets slide left.