If you have a great dane and especially if you intend to breed, it is important that you study the ancestors on your pedigree. The whole purpose of breeding is to only use the best specimens with their health tests and the goal is to improve and preserve. Here is an amazing website with information and photos of dogs of the past. Become a student of the breed and study ringside and pedigrees for a minimum of 5 years before breeding. After all, anyone can stick to dogs together and call themselves a breeder. But when you purchase the best foundation bitch, finish her championship and health tests, breed her to the best male that suits her well and you have a health litter, there is nothing more rewarding to see that next generation in the ring. Do it right or don't do it at all - Please...they depend on us!