The statement you are referring to is a popular fan theory, but it doesn't have any basis in the book or movie. The theory suggests that Katniss might have used the money she earned from her illegal trade of food to purchase a goat, intending to offer it as a prize to Peeta for winning the Hunger Games.
However, there's no evidence to support this theory in the books. Here's why:
* Katniss's focus: Katniss is primarily concerned with survival and the well-being of her family. She would not have spent her hard-earned money on something frivolous like a goat, especially not when her family was struggling to survive.
* No mention: The books never mention Katniss buying a goat or making any plans to do so.
* Lack of practical use: A goat wouldn't have served any practical purpose for Katniss, and it would have been a major burden to care for in District 12's harsh environment.
While it's an interesting theory, it's important to stick to the established facts in the books when discussing "The Hunger Games."