What is the most expensive animal product in Stardew Valley?

Have you ever wondered which animal product in Stardew Valley commands the highest price tag? It's an intriguing question that many avid players of the game ponder upon. With a vast array of livestock to choose from, ranging from chickens to pigs, cows, and even ducks, it's understandable that one might get curious about which one yields the most lucrative returns. So, let's delve into this intriguing query and find out: what indeed is the most expensive animal product in Stardew Valley?