For DNA testing pull a few hair from the mane/tail and make sure that the root is attached.
Before only the approved for breeding and elite horses were DNA required but now they have to satisfy the WBFSH requirements having been upgraded from an associate member to a full member.
The actually inspection goes something like this and there can be a few variations.
They usually do the young stock first so unless you want to spend the whole day there find out how many youngsters are being done and judge your arrival by that.
Any horse 1 year or older is shown in bridle. No other piece of equipment should be on the horse. Try to keep it simple with just a snaffle and plain bridle that makes the head look smart. You will be required to walk the horse around a triangle and also trot around it as well. You may have a person behind you to "encourage" your horse forward but that is your choice. You may carry a hand whip also. You can do the above with the bridle reins or a lead attached to the bit...your choice.
I suggest you wear something that allows you to run very fast so the horse can truly show itself.
After this you will place the horse at the triangle apex and have the horse judged one area of its body at a time.
I suggest you work on getting your horse to work well in hand and and conditioned so it shows good weight, substance and condition.
Your horse does not require a show record unless you are trying to upgrade your horse without being ground inspected.
The possible levels your mare could fall into are...
Supreme at 80% or above.
Blue preferred at 75% to 79.9999
Red preferred at 67% to 74.9999
Certified at 62% to 66.999 and must obtain at least this 62% to pass inspection.
75 % and above is breeding approval level.
If you have looked at the site and are still confused even with the above please give me a specific area you have problems with. http://www.americanwarmblood.org/ins..._to_expect.htm