Why does the COBRA appears

I don't seem to be understand why and how it will appears
( as long as don't tell me it came by bus).
The thing I most angry is why it must eat my hamster but not the rat as rat is free but to have hamster, we must buy them.


I think I will still be wondering after days and days and days.......

why the snake can be at there?
will there be second or third snake appears?
Where is it from?
Will it's mother will come here?
If it really like my brother said(it is lost), it may happens to other of the snake too.....


This planet is not more a safe place anymore as I still couldn't believe that I have seen a real poisonous snake in front of me and I scare next time, I may be seen something much more scarier.