Welcome to the Pet Rescue Community
Do you need help with your game? Ask the Community for help.
I agree that it is very frustrating when you get to a difficult level and get stuck.
I have managed to play every Pet Rescue level without boosters or extra moves (or paying for anything) up until Level 1609.
Some have taken days to pass, but usually if they are really hard the level will be changed next time the game updates.
Unfortunately the one I'm stuck at has not even been labeled a 'hard' level... (yet?)
If you get really stuck it is a good time to use some of the free boosters that come from playing the bonus games, or look up a help guide, or join a Facebook help group for tips. I can recommend some if you like?
Or if you have a specific level you're at now and need help, just ask here