I ate a little furry animal

I ate a little furry animal
By accident
Or at least not consciously.
It was an odd thing
Feeling him squirm desperately
Trying in vain to reverse the inevitable.
His fur got caught in my teeth and made me thirsty.
He continued to squirm
Once in my stomach
And it made me feel weak at the knees
With nervous excitement.
This unexpected meal had the unfortunate consequence of ruining my appetite.
I still can not tell
Whether the little furry animal
I ate by accident
Caused my illness or caused my cure.