All the dogs needed to adapt to they little amount of food. They also needed to adapt to the harsh treatment. With all the bad treatment the still needed to do a lot of work
Buck in the wild
Buck had to adapted to the weather because it was negative fifty degrees. Then he needed to get stronger so he can pull the sled. Since buck could adapt it gave him the power to kill Spitz
Dolly after the wolf pack attack gets rabies. Dolly can not adapt and stay calm. There for she attacks buck and gets her head chopped off.
when Buck left John Thorton for two weeks Buck went up against a lot of crazy animals. With all those crazy animals Buck adapted very quick so quick that at the beginning when he killed a bear it was easy for him. then he finally found the perfect fight for him with a bull and still won which proves how good he adapted.
Curly could not adapt to its new life. when the dogs started to attack Curly couldn't even defend herself.
Buck adapted to the wild and had a family when truly he is still a type of dog but he adapted and now is basicly a perfect wolf. Now he is known as the Ghost wolf and all the humans are confused because the younger wolfs have brown spots because they are Buck's kids. So now dogs are adapting and are like wolfs.