I watch a fair number of cow videos, and the main thing I’ve learned from them is that they are very curious. Do something weird near them, and they’ll all come over to check it out.

Curiosity is the first step to thinking. Most of them are going to be pretty dumb, but there will always be a few, or at least one, who is going to be smarter than the others. They’re standing around doing nothing all day, is it so surprising that one of them with a few more brain cells finally figured out something?