Pet Rescue Saga Level 499
Target: Save 16 pets
First, try to get the key and unlock the locked blocks, this gives you more blocks to work with and allows more pets to fall.
To get the required number of Pets down in the limited moves for this level, use the bombs and springs (line blasters) to open mesh from the balloons.
Try to pop balloons of the colour block that there are most of on the board.
Use the springs to bring things down and keep the bottom row free for the pets to drop into.