Welcome to the Pet Rescue Community
Do you need help with your game? Ask the Community for help.
Also official word from our CM
"To send a life, a friend on your list must have fewer than 5 lives. Then, the blue heart button will get activated, indicating that you are free to send a life. However, there is a limitation: you can send only 1 life to a friend every 12 hours. In other words, there is no way to request a life, as the system automatically recognizes if friends on your list don't have full lives and need your help."
I hope this helps 🤗