It sounds like your friend is excited about Lisa's news! From the message, it's clear that Lisa's cat (Tatze) has given birth to 3 kittens. Here's a translation of the message to help you understand it better: "Omg!! Did you see what Lisa shared on Instagram? Her cat has given birth to 3 kittens - the little ones look sooo cute. I want a cat :(((" So, to congratulate your friend, you can say something like: "Herzlichen Glückwunsch zu den 3 neuen Kätzchen! Sie sind bestimmt unglaublich niedlich!" (Translation: "Congratulations on the 3 new kittens! They must be incredibly cute!")