Re: can a broiler chicken be genetically modified to be like a native chicken?

This is an interesting question, but is almost more philosophical than 
scientific.  In theory we can genetically engineer whatever traits we can 
figure out how to do.  But I think the better question is what would 
happen if you took a modern broiler chicken and raised it less 
intensively -- I'm not quite sure, but it should simply grow slower as 
long as it is provided with reasonable conditions.  It probably is not as 
tolerant of extremes of heat and cold as the typical barnyard strains, so 
it will need more attention.  I should also point out that there is not 
one "native" chicken. We use many different strains around the world.  
So, hopefully, these comments provide a reasonable answer for you.