[header] How to unlock more levels in pet rescue saga [title] Ask friends. [step] Once you've reached the gate for the next locked level, you will need three tickets to unlock the next levels. The easiest and simplest way to get the tickets is by requesting them from your facebook friends. 
[substeps] On the " unlock more levels! " window, click or tap the " ask friends " button. You have to be connected to your facebook account from pet rescue saga for this to work.