Curly was not capable of adapting because on pg:15 it said "that she was being to friendly to the full-grown wolf,there was no warning ,the wolf leap at Curly and killed by ripping Curly face open eye to jaw,Curly was the next victim to the wolf.
Spitz vs Buck
spitz was capable of adapting because on pg:16 -17 when the wolfs come spitz bit buck on the neck,spitz would bully the other dogs if they were doing what they were not their work,spitz would teats them to,spitz waned to fight buck because spitz wanted to be leader dog.
buck was capable to adapting because on pg:22 -23 when buck killed spitz and became leader,buck would scrath or bite of the other dogs would not do there work,and on pg:68 -105 buck protect john Thornton because john protected buck when he was getting beaten up,since that day buck made john his ideal master.
the man in the red sweater
on pg:22 spitz attack buck because they went after the same food which is a bunny,then buck knew that this was going to be a final fight,that him and spitz,then buck was going down everytime when he went to go attack spitz,then finally buck leap,and killed spizt,buck become the lead dog.
Dave was not capable of adapting because on pg:48 it said "Dave was suffering the most" Dave was suffering because something was was wrong with him,Dave was really sick,so Francois killed Dave because so Dave wouldn't feel the pain anymore.
the man in the red sweater was capable to adapting because on pg:9-10 the man in the red sweater would teach the dogs to listen and make them listen to him and if they did not they would get beaten by the club,like he did to buck,the man in the red sweater would do this to the dogs he kidnaps and beats them if they don't listen.