endothermy and fur

[WileE81@aol.com]

All this talk of feathers and fur 
has gott me wondering ,and  forced out of  lurking  to ask a few questions 

Since we now know that SOME theropods had some sort of feathers and/or feather
like fur  what does this do for the endotherm argument ? 
Is the notion of cold blooded thereopods a thing of the past?
and could it be possible that smaller theropods....errr  dinosaurs    were
developing an endothermic metabolism much faster than their larger
counterparts, and possibly be a major factor in extinction theory?
hmm......

I apologize If this has been discussed already
if so please point me in the direction of the posts  in the archives 

Thanks

regards to all  
Frank 

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