Pet Rescue Level 570 Tips
Use first the key in the left and after that the key in the middle. The two pets will be captured in the fortified wooden cages. The secret in this level is to bring the three cages in the same line with the line blaster and destroy with it their fortification and after that to be smashed in locked blocks and be totally destroyed. Only then you can use the third key to unlock these blocks. After this point rescuing the three pets is not a difficult task.
Pet Rescue level 570 Walkthrough Video
For those of you that have troubles with 570 you need to stay calm and watch our video: