Pet Rescue Level 677 Tips
You first object is to drive the pet box in the middle with the same colored blocks under it in the same column. So clear the necessary blocks, use the hammer booster that gets activated and release and the other two pets from their pet boxes. After having rescued the initial three pets it’s realy quite easy to rescue three more to complete the level.
Pet Rescue Level 677 Walkthrough Video
Here you can find a useful video guide on how to beat level 677!