Whew! Your friend's cat has just given birth to five kittens. That's quite a number of new life! Congratulations to your friend and her growing family. Here's a simple message she might appreciate: "Wow! Five little kittens - that's amazing news! I'm sure they're all so tiny and adorable. Please give your cat a big hug from me and enjoy this precious time with your new little ones. Congratulations on the newest additions to your family, and I look forward to seeing photos soon!"