to the boxer owner:
1. i hope you are aware that with every single heat your dog goes through, the risk of her getting mammary cancer later in life increases. if you care about your dog, always keep that in mind. itmay not mean much to you, but i have just recently lost a dog to this terrible disease and feel awful knowing that she could have lived a good 4 or 5 years longer if i had had her spayed early in life.
2. if she has seizures she's not healthy enough to be bred in the first place, since she will pass on that health issue to her offspring. it doesn't really matter what caused those seizures, creating another generation of dogs who will be prone to that is flat out irresponsible - to the puppies as well as to the future owners.
3. you may consider conformation shows as nothing but "beauty contests" and you may not be interested in producing anything but pet quality dogs, but have you ever considered that the puppies you will be bringing into this world have the right to be the healthiest they can be, with the best possible chances in life? if you care so little about proper conformation, you are not likely to choose a good sire either and your whole breeding program is nothing but a back yard production and you are doing nothing at all to preserve or improve the breed - instead you are doing it a disservice by creating mediocre dogs that may be used to create more mediocre dogs down the line.
if you are so dead set on breeding, get a mentor who can teach you everything you need to know about breeding, start out with quality foundation stock, research sires and carefully plan your litters.