No, they`ll keep spawning.
Surround it with torches, which will stop anything from spawning, then simply destroy it with a pick.
3-4 months. And they usually stop spawning at a little over a year.
Nothing! You do get some XP though, and the mobs stop spawning, but you cannot obtain the spawner.
Get a better PC
to stop hunters killing them and to breed them.
Deer never stop spawning on Oblivion just like any other creature in the wild. Though they may be in random places.
/toggledownfall to stop or make rain in minecraft
In a way, yes. Monsters can't spawn in places where the light its too bright. Candles can stop zombies from spawning in certain places, but they won't prevent a zombie entering a lit area.
Stop playing
Yes, if they are still needed for a job or to be improved but if technology replaces them in doing their job then they might not be bred but there are rare breed farms(19 around the UK) where they breed animals specifically to stop them being wiped out.
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no1 likes minecraft stop playing it