Can a Horcrux kill/destroy another Horcrux? and other questions . . .

[jaxx189]

No: HPFGUIDX 145058

Hi everyone! I rarely post but I have recently started the sixth  
book for the third time and while reading it, it made me ponder the 
question for those of you who believe Harry Potter is a horcrux, I 
have yet to make up my mind on the issue, can a horcrux destroy 
another horcrux.  In book two the spirit of Voldemort obviously was 
trying to kill Harry Potter.  If Harry is in fact a horcrux, can 
another element of Voldemort's own spirit or soul destroy or be used 
to destroy another element of itself?  or is the diary horcrux 
merely on survival mode and its thinking is "either i destroy you or 
you destroy me"- a survival of the fittest mentality.
also, at the begining of book six in Snape's house, while discussing 
Dumbledore's biggest weakness, he mentions that the wise wizard is 
getting old and "has since sustained a serious injury because his 
reactions are slower than they once were" (HBP pg. 31).  Does Snape 
know about the horcruxes?  Would Dumbledore have trusted him enough 
to tell him about them? If Snape is bad,evil, or a Voldy supporter, 
and was told about it then it is possible that he has told the dark 
lord and Harry's chance of survival are very grim and his death is 
in sight.  if Snape is good, and Dumbledore was right all along in 
having faith in Snape, then Snape potentially knows the steps that 
need to be made in order to defeat He who must not be named!!!  
hope someone knows more insight to this than i do.
sincerely
john