Based on your friend's message, it sounds like Lisa's cat (referred to as "Tatze," which is German for "paw") has given birth to three kittens. So, to congratulate your friend on the new arrivals, you could say something like: "Herzlichen Glückwunsch zu den drei süßen Neuankömmlingen in Lisas Katzenfamilie! Die kleinen Kätzchen sehen wirklich entzückend aus. Vielleicht ist es bald an der Zeit, dass du deine eigene Katze bekommst – ich drücke dir die Daumen!" This translates to: "Congratulations on the three adorable new additions to Lisa's cat family! The little kittens really look delightful. Maybe it's about time you got your own cat – I'm keeping my fingers crossed for you!"