Llamas, of course, are much larger, somewhat more imposing and apparently too strange for horses to consider casually. Whereas, the alpacas are about the size of a large sheepdog.
On the day of this photo, Royal made the choice. He could have stayed in his own quarters and not pushed the gate open and joined the alpacas, but on up the hill he went. This boy has a mind of his own and loves being with them.
At night he could stay in his stall, but much prefers to stand outside the alpaca pen with his head over their gate. I think it has something to do with their peacefulness.
The alpacas have a wonderful philosophy of life ... it is all about being calm. It is really rather nice to sit on the bench and try to absorb their tranquility.