Based on the message you provided, it seems your friend is talking about a cat that gave birth to 3 kittens. The German word "Junge" generally refers to offspring or young animals, and in this context it is plural which means more than one. The number mentioned is 3. So the cat had 3 new kittens. I hope this helps clarify the situation so you can congratulate your friend appropriately on the arrival of the kittens! Let me know if you need any other assistance.