Looking at the hucow AU and I'm so intrigued by the pairing of Cow Idia and Farmer Cater! Idia's milk is described as the rarest, so is his output especially low? Does Cater sell his Gamer Boy Breast Milk? I can imagine him having a whole Magicam dedicated to his farming adventures if hucow rearing is normalized in this AU.
Idia's main problem is that he is so so so very moody. Doesn't like the way his food is made that day? Decreased production. Cater was accidentaly too loud for his tastes? Decreased production. Lost an online game? Decreased production. The weather is a little bit too sunny? Decreased production. His favorite hoodie is 2% less soft than usual? Decreased production. Cater had to tend to another cow? Decreased production. By the time you need to milk him, he is probably already at a -50% output. His milk ends up being delicious and has a very high demand especially from fancy restaurants, but it is a STRUGGLE. Cater, despite being Like That, just striked the perfect balance needed for Idia to at least produce something even if he still complains about it, so they continue on with their little daily life.
Cater works on Yuu's farm, so while he doesn't sell Idia's milk directly, he does feel very proud that he is managing to help his friend (and his cow) out. The pay is suspiciously good, there are benefits, Yuu is cool... It's a lot of work between taking care of Idia and other cows, but he enjoys it. Idia himself also goes full smug gamer mode when he hears how much profit his milk made. I don't think he would admit it out loud directly, but Cater can see how he gets lol
Unfortunately, he cannot take pictures of Idia because he then stops producing for a whole week + also gets sad, so he posts a lot about the job, but some people think he is making Idia up because he never shows the actual cow lmao He does take photos of the other ones, but Idia remains everyone's conspiracy theory. The genius gamer blue hucow...