It was not a figure of fun.
Too dead now to pity.
To remember its life, din, stronghold
Of earthly pleasure as it had been,
Seemed a false effort, and off the point.
Too deadly factual. Its weight
Oppressed me—how could it be moved?
And the trouble of cutting it up!
The gash in its throat was shocking, but not pathetic.
Once I ran at a fair in the noise
To catch a greased piglet
That was faster and nimbler than a cat,
Its squeal was the rending of metal.
Pigs must have hot blood, they feel like ovens.
Their bite is worse than a horse's—
They chop a half-moon clean out.
Line four describes the terror of the piglet, using a disturbing  metaphor  … “the rending of metal”.  But this is in the past and unrelated the present dead pig.
View of a Pig