On Cheetah

The best thing I like in safari is the articles on animals and plants. The unique characteristics of all the animals and plants are simply awesome. Safari maintained the legacy with the article on cheetah. Sad to know that this precious and unique animal is going to be extinct.
Safari explains the reason for this. Some thousands years back there was a natural calamity and many cheetah died. After this the gene pool of the cheetah became constrained. Because of small gene pool they didn’t get the better genes which would help them survive. So slowly their numbers reduced and now they are near extinction. I’d call this theory “extinction of the weakest”.
Now this theory makes sense in all the theories of origin of species except one. Now some of the theories I know are as follows.
1) Theistic evolution held by some Christians (species evolved, but god helped them to evolve). Now if God was part of the evolution process in past and is not now, the evolution might be stopped. So the constrained gene pool will result in weaker genes and the species will go extinct.
2) Intelligent design theory propounded by many Christians and Muslims (nothing evolved, everything is designed). The species were designed from the beginning to live in some specific environment. After the specific environment is unavailable, the species will have difficulty surviving. E.g. Cheeta, Australian frogs. Converse is true also. If the environment doesn’t present the size limiting measures the specie will abound. E.g Ganda Baval of Gujarat.
3) Survival of fittest/Random mutations/chance theory (everything evolved by random mutations without interference of any external entity). Now this theory has real problems. Living things try to change themselves according to the surroundings and in the process they evolve. The cheetah itself is evolved as part of cat family from a different cat in past. Now if cheetah can come into existence because the earlier cat specie adjusted to the surroundings, why can not cheetah adjust themselves to the surroundings? Cheetah should have acquired the needed counter-mechanisms to survive if this theory were considered true and applicable in this case.