I'll be starting my Chihuahua, Wynston, in agility soon. I made a hurdle out of PVC piping, at 8" high, just to see if Wyn would take to it. He's loving it so far, even though he was a little hesitant at first. There are a few different agility courses in town - indoors and outdoors. When I take him to the park, he constantly runs so I know he has the energy to exert.
If anyone has advice or videos, I'd love to see them