Regardless the area of interest, but especially the one of the pigeon breeding, the mastery is acquired over time, after many experiences and many mistakes. But we all know that a great way to make rapid progress is to learn directly from experienced people, and more importantly, to have the ability to learn from their mistakes.
Marathon pigeons are distinguished by their genetic qualities, we could say they are being gifted with spectacular DNA. However, as humans are, several elements are essential for good health and extraordinary results.
The number one for me is the Kipp family, on the line of King Barcelona that I own and have been working with since 2005. The best example would be Dutch, a female directly from Jan Kastelijn with 100% Kipp & Sohne blood, the daughter of two grandsons of King Barcelona.