in the mail today. I just got her this little beginners set so she can practice a few things in my backyard. It came with a jump, starter box, tunnel, wave poles (which we are of course no where near), and a few other little things to go along with it. I set it up and she was doing well with the tunnel and the jump.

The trainer I had a couple of years ago when I took my Doberman through agility training had a minimum age of 9 months for smaller dogs and 12 months for larger dogs, because she said that they need to be at least that old for their leg bones and joints to be mature enough to handle the jumping without causing physical damage.

A good solid "Basic Obedience" course would be the most helpful thing you could do for Nibbler right now, if you're considering further training later on---comes in REAL HANDY during agility training!   And he's not too young to start obedience training!