On the way home after church, I saw them again, so I slowed to take a closer look. They were, in fact, llamas. Now, there are several llama farms in the county in which I live, but none near my church. Until now, I guess.
I could see a car approaching in my rear-view mirror, so I sped up. But then I saw that car slowing down, presumably to look at the llamas. I guess that seeing llamas at the side of the road is sufficently unusual to compel people to stop and look at them.