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 Neuankömmlingen! Drei kleine Kätzchen sind wirklich ein Grund zur Freude. Lisa muss so stolz auf ihre kleine Familie sein. Vielleicht ist es ja bald an der Zeit, dass du deine eigene Katze bekommst – ich drücke dir die Daumen!" This translates to: "Congratulations on the adorable new arrivals! Three little kittens are truly a cause for joy. Lisa must be so proud of her little family. Maybe it's time for you to get your own cat soon – I'm keeping my fingers crossed for you!"