From this we are to assume the world was cooling off at a rate slow enough for the feathers to evolve... otherwise these animals "evolving" would have died before evolution could occur.
Nope. We would assume the critters were becoming warm blooded and needed a form of insulation. Small animals lose body heat rapidly, which is why even tiny desert mammals have fur.
But wait, doesn't part of evolution theory state that dinosaurs (the species that "evolved" into these birds) were wiped out during a possible asteroid hitting the earth; something that caused mass death of the dinosaurs. If this happened, how did they have enough time to evolve into another species? Or had they already evolved? But that poses a problem. If this did occur, how did these other species survive?
Birds evidently evolved from therapod dinosaurs (see my mention of archaeopteryx, above). The dinosaurs were evidently on the way out when the asteroid delivered the coup de grace (the number of dinosaur species found in the fossil record had shrunk considerably in the few million years before the impact). Birds had already branched off and been evolving for nearly 100 million years at this point. The birds and mammals of the period were not nearly as heavily stressed by the impact as the dinosaurs, probably because the former were fully warm blooded and typically smaller and this gave them an advantage in competing with any surviving dinosaurs.
Perhaps they went to the Wizard of Oz and he gave them 'warm blood'?
This is the ridiculous nonsense that the evolutionists keep pushing on people. If necessity is the cause of all these changes then why is it that we still have examples of creatures which are identical to those of some 500 million years ago? How come that the mutations stopped for these creatures? Who told them to stop changing? Did not the environment change for all creatures or just for those which the evolutionists wanted to change?
Survival of the fittest only destroys, it is not the agency of creating anything.