I am currently writing a novel called Rubiks World. In the 3rd chapter(which might become the 4th or 5th chapter) is the first time that the cubes encounter big cats. 3 5x5 cubes go to a place in the african savannah where there is a tree and thornbushes. The first one attracts the gazelle with grass. The gazelle is injured from the thornbushes and so is put in the grassy area surrounded by thornbushes. The second one sets up box traps. The third one climbs up the tree(thankfully no leopards around) scouting for predators. He spots a mother cheetah and her 4 cubs. The cheetah cubs are old enough to eat meat so they follow the mother cheetah as she hunts the gazelle. On the other side he spots lions. He knows the lions are going after the injured gazelle and not the cheetahs. The mother cheetah and her cubs are trapped at the same time that the lions kill the gazelle. They take the cheetahs with them to the other cubes. These 4 cubs are raised and their mother is let back into the wild. It turns out to be 2 males and 2 females. These cheetahs are then trained to use their fast speed in woodlands without being foiled by all the trees. They are then bred into 42 different types. These 3 pattern types, 2 fur thickness types, and 7 color types to be specific: Pattern: Normal King Spotless Fur Thickness: Normal Wooly Color: Normal Red Cream Gray Blue Black White By then the cheetahs have been domesticated and each of 42 cubes has their own female cheetah. These domestic cheetahs still hunt but now they always bring it to their owners. They then decide to raise the 2nd largest african cat, the leopard to eventually domesticate it. Once every type of leopard has been raised they are domesticated. The cheetahs are a little afraid but the leopards are trained to be nice to the cheetahs. Eventually the cheetahs come close to the leopards and even mate with them giving birth to cheetapards. This is their 2nd major step towards the modern domestic cat. They then use the same approach with lions, jaguars, tigers, and then eventually all the wildcats are domesticated. There are still their wild counterparts though and not a major decrease in any species. Now that they have every wildcat species they then use trial and error to form every cat breed that exists. After that they build a pet store where cubes, cuboids, and other shapes can buy domesticated wildcats, cat breeds, and even some wildcat hybrids like cheetapards and ligers. Now the cubes know the mating formulas for each cat breed and so if they are out of that cat breed and somebody wants it they can give them the mating formula and the 2 starting cats(Which could be cheetah and lion, leopard and tiger, etc.). Now the cubes clarify which of the pair is supposed to be male and which is supposed to be female for each mating so that nothing goes wrong. That is unless they are out of a certain gender of 1 of the starting cats. But in that situation the cube, cuboid, or other shape wanting to produce that cat breed could ask something like "Can I borrow your lioness? I need it to produce this cat breed." But even if the cube, cuboid, or other shape does that he/she might say something like "No my lioness is sick and she is not in heat." In that case if the cube, cuboid, or other shape asks everybody who has a lioness and they all say no he/she can go to the pet store with his/her 1 cat and the mating formula and ask them to produce a lioness and give it to him/her when she is ready to mate. This leads to 2 situations. The better situation is that they have female lion cubs and say "Yes". The absolute worst situation is when they don't have any female cubs and say "Sorry. We don't have any female cubs. You will have to ask people if they have a female lion cub and raise it or if you don't find any, tell us and we will domesticate more lions." But this is a last resort since usually at least 1 cube, cuboid, or other shape would say "Yes she is healthy and in heat. You can have her and then give it back to me when her offspring are 2 years old."