Registered or Not
If you have the funds available to buy registered stock, do it. If you can’t afford to now, hold off on getting started until you can afford them. Trust me, it is really worth it to pay more now rather than later when you discover just how much better registered animals can be. A registered animal will not only sell for a whole lot more, but also prove its worth with a higher quality.
Young or Mature
Depending on your goals, you may choose to start with young stock and wait for them to grow up to breed, or you may buy established animals who are ready to breed now. In most cases, it makes sense to get adults, but they will cost you more than young animals. You will see a return on your investment quicker with animals that are of breeding age.
It is easier to fine tune your breeding goals when you have good animals to begin with. If you get animals that are subpar, you might find problems a few generations down the road, and starting over by then will be quite difficult. Though they may cost more, registered, quality stock will usually pay for themselves in the long run.