Hehe. Don't rise to the bait.
Some people prefer not to condition that young, but it is up to you. If you want to condition your dog to a lean and muscular state, work the mess out of her and vary what you do. Road-work, treadmill, springpole, flirtpole, fetch, drag sled, etc. Work her hard and feed her a high-quality food. This is, of course, assuming your dog is healthy and parasite-free.
Lindsay & the Gravity Dogs
"Though she be but little, she is fierce." -- Shakespeare