Pet Rescue Saga Level 9439 is a very difficult level, below are some tips that I used to get me through it:
Use the balloons within this level as much as possible, they will help remove large groups of blocks, and fill the butterflies 🦋
If too many red butterflies fall use your in-game line blaster to remove them so more of the pink/purple butterflies can drop instead.
Use boosters if you have them, more balloons to fill butterflies or line blasters or rockets to get rid of the red ones.
Good luck, an example is below, no boosters or extra moves were used, but it did take much time and patience 😸
