Pet Rescue Level 665 Tips
In pet rescue 665 try to release the key (make it hit in ledge), but don’t use it, before you are able to see all the concrete blocks of the level. Moreover, we cleared all the possible blocks of the level before use the key. After that, just let the infected blocks to expand under the pets, clear them and you’ll have both pets rescued.
Pet Rescue Level 665 Walkthrough Video
If stuck on level 665 you should definitely watch this video: