The Stalking Sheep

I thought I saw a sheep today, waiting by the gate
Maybe it had gone astray through some mishap of fate
But strangely it did not appear to want to go away
Perhaps it was the same sheep that I saw there yesterday

If I go out it follows me wherever I might go
It stays a way behind me, but always remains in tow
I don't know what its motives are or what compels the beast
Nor from where it first emerged; from what mad farm released.

At the supermarket checkout, by the door I see it wait
As the cashier quietly asks me 'Is that your sheep out there, mate?'
I deny the sheep is with me, but the sheep gives that a lie
When it turns to follow dog-like, as I sheepishly walk by.

I don't know what I ought to do, I doubt that the police
Will care much for a stalker who has four legs and a fleece
But still it is quite sinister; I feel some kind of threat
But what it is, I don't know, for it hasn't done it yet!