Comment by Someone

> Cows and sheep in the UK (and I guess much of Europe) wander round outside all year round

Probably most of them, but definitely not all of them. https://nltimes.nl/2025/08/18/dairy-cows-netherlands-never-g...: “The total number of dairy cows in the country reached 1.5 million last year. Of these, over 460,000 cows—roughly 31 percent of the national herd—did not spend any time outside“

A factor with cows kept for milking is that you want them to be able to walk to the milking robot at all times, and moving food to where the robot and the cows are can be easier than moving the robot to where the food and the cows are.