Based on the message your friend shared, Lisa's cat (referred to as "Tatze," which means "paw" in German) has given birth to three kittens. So, when congratulating your friend, you should acknowledge the arrival of these three new babies. Here's a possible way to phrase your congratulations in German: "Herzlichen Glückwunsch zu den süßen kleinen Kätzchen! Es ist wunderbar, dass Lisas Katze drei gesunde Junge bekommen hat. Ich hoffe, ihr genießt die Zeit mit den Kleinen. Vielleicht ist das ja auch ein Zeichen, dass du bald deine eigene Katze haben solltest! 🐱💖" This translates to: "Congratulations on the adorable little kittens! It's wonderful that Lisa's cat has had three healthy kittens. I hope you enjoy the time with the little ones. Maybe this is also a sign that you should get your own cat soon! 🐱💖"