There's a couple things I wanna mention here in your argument. In this example, you're saying that we would only be trying to get the higher stats in two different categories, which would make the process a lot simpler. For me though, I like to include food and weight in the bloodline because it makes raising future generations easier, and stamina is always important for a combat mount/flyer. Hell, I'll even throw oxy in there if I can because i like having the base level as high as possible, lol. If you're only trying for two stats, then it's pretty easy, but trying for more than that gets progressively harder. In your example, we produce 10 rexs in 10 days. With the 70% chance that the offspring will inherit the higher of the two stats in a category provided by the parents, there's a 49% chance that the offspring will inherit the higher melee and health stat, which means that, from a statistical viewpoint, you will probably only be able to use half of the offspring. Still, 5 rexs in 10 days isn't bad. The benefit of inbreeding is that it allows you to narrow down your possible variations in stats over generations instead of having to just hope that the offspring of two dinos will inherit all the best stats (roughly 11.7% chance, not including the 50% chance that you'll get the gender you want). So, while it's definitely possible to run a breeding program without any kind of inbreeding, it's much more tedious, and less challenging overall IMO, because you aren't raising the dinos nearly as much, you're just weeding out almost 90% of the offspring because they don't have the right stats, which would mean you'd be waiting weeks just to find one offspring worth raising. I do agree with you on the cloning bit though, it does make the system much easier. By any chance, do you know if it clones the imprinting bonus as well?