Questions are good, that's how you learn! (And when I don't know the answer, that's how I learn, too

)
Judges are certainly more lenient with puppies, you wouldn't expect a puppy to have the muscling of an adult. Of course, the puppy shouldn't be fat

- you want to be able to see the muscles, but they aren't expected to be "clean and hard" at that age. (Of course, all judges are different and some do seem to think puppies should just be small adults - they are the exception, though!)
I think in Germany that the pre-breeding testing requires the dog to be able to run at a steady pace for 5 miles (but maybe just 1 mile...) Some dogs muscle up more easily than others - the ones that need some help are usually "road-worked" - which involves moving at a show trot (about 5 mph) for a mile or more daily. This should never be done with puppies, as it is very hard on the joints - 18 months at the earliest - and you gradually work up to that distance. Most people road work either with the dog on a Springer attached to their bicycle, or with the dog running alongside their car (or, if you have a pickup or wagon, behind, with one person driving and one sitting in the back holding the dog.) Of course, you want to find a quiet street or parking lot to do this!
For puppies, I personally don't believe in any forced exercise, but I'm more paranoid than most

I let my puppies run around the fenced yard with the other dogs as much as they want, but I don't do anything other than that with them.
Specific weight/body condition is hard to say, because they are all so different. In general, at the proper weight you should just be able to see the outline of the last 3 ribs, and the rib area should feel like the back of your hand.
Socialization is the most important thing IMO for preparing your puppy for showing, but you can also work on stacking, gaiting, etc. Just make it fun and keep the sessions short - you don't want the puppy to learn to hate showing or think it is boring! There are some people who will say you should never play physical games like tug-of-war or wrestling with your dog, or it will become dominant. I personally feel (and there are behaviorist who agree

) that it is fine and beneficial to play these games with your dog, as long as the dog understands that you say when it is time to play and you say when it is time to stop. There's a good article on this at
www.pawsitivebehavior.net, although I'm not sure if she's still allowing you to view them for free :mad:
As for learning grooming - a breeder or handler will probably give you the best show-specific information. There have been a few discussions here in the Showing forum, as well. Rick Tomita's book "The World of the Boxer" has a good section on grooming, and Pat Hastings "Tricks of the Trade" has some good general tips. The nice thing is that with a puppy, there is a bit of leniency, so you can learn the more "sophisticated" tricks as you go. Basically, you want to trim anything that takes away from a clean outline - whiskers, ears, the edge of the "tuck-up", etc. Nails should be clean and short (long nails cause the foot to splay, and can cause permanent damage). The nose should be soft and clean - puppies are usually not a problem, but sometimes as they get older the nose tends to dry out some. Vaseline or a similar substance helps to loosen dirt and soften the nose. Boxers are really pretty easy to groom compared to some other breeds!