Thousands of Sheep Spawned Naturally - A bug?

[TeeKay]

So, a couple friends and I have been playing Voltz for a few days. I was Jet-packing around, when sunndely, I stumble across this:

It's hard to see exactly how many sheep were here. Most of them are off-screen. My framerate was so terrible it was hard to take a screenshot at all. Is this a bug? What could possibly cause this many sheep to spawn?

As funny as it was, it's actually sort of a problem because standing anywhere within 100 blocks of the sheep causes insane framerate drop.

[Vivacity]

Are you the only op on the server?

[TeeKay]

No, but the only people on the server are five of my close friends (it's my server), and as far as I know, we don't even have a plugin capable of spawning sheep like this. It's also fairly far from home.

[Vivacity]

Well there's no vanilla server command to kill mobs.

Perhaps time to bring out the tnt?

[TeeKay]

I wrote down the co-ordinates.

I'm learning how to make and launch missiles right now . . .

[alekthefirst]

remember to kepp the chunks loaded!

[Vivacity]

remember to kepp the chunks loaded!

Well that's one way to overload a server.

[alekthefirst]

Well that's one way to overload a server.

didnt mean it that way, only for when launching missiles at the sheep

[alekthefirst]

Well that's one way to overload a server.

didnt mean it that way, only for when launching missiles at the sheep

EDIT sorry didnt mean to double post, i got a error of some sort while posting the first time

[Jharii]

What is that freaking cow doing there?

[Lethosos]

What is that freaking cow doing there?

You know how you sometimes take a wrong turn that you don't realize that you did, and the next thing you know, you're up to your pits in the middle of a huge gathering of Hare Krishna?

Yeah, like that.