I'd be happy to help you congratulate your friend! It seems like your friend Lisa's cat has given birth to three kittens, as mentioned in the text "Ihre Tatze hat 3 Junge bekommen" which translates to "Her paw has given birth to 3 young ones" in English. So, you can congratulate Lisa on the arrival of her cat's three cute kittens. Here's a possible congratulatory message: "Wow, congrats to Lisa on her new cat family! The three little kittens are absolutely adorable. I'm certain Lisa will enjoy their company and care."