Welcome to the Pet Rescue Community
Do you need help with your game? Ask the Community for help.
Hi Kelly,
I apologise for you not being answered before now.
Are you playing on a tablet or phone? Unfortunately the boosters are saved on the device in the memory, not the game itself. So reinstalling or even updating can mean that they are lost.
In future if they are bought ones and you need to uninstall, please come back and tell us and we can have a moderator look into it.