There is a political movement opposing the making and selling of sheep cheese: Veganism -> the ethical part of it is political.
How much do you pay the workers selling the cheese? -> political
How are you allowed to buy sheep? Online? In a package? Are you allowed to clone it? -> political
How many taxes do you pay - how much does "big sheep"? -> political
So while it mostly is not a political act of you to sell the sheep-cheese there are a lot of political questions surrounding the selling of it.
It can however also be a political act: selling sheep's milk at a religious event that is strictly against sheep's being milked by humans can be seen as a form of protest.