Bedtime reading

Before I went to sleep last night, I was reading:

"The problem was that after relying so long on instinct and intuition, both these ladies had turned into vultures and were sucking me dry. Even spontaneity had become a blind goat. My haystacks weren't tied down and I was beginning to fear the wind."

Bob Dylan, Chronicles

I looked again this morning, and it still says that: the old man hasn't lost his touch, has he? I mean, vampire vultures are one thing, but what's with the blind goat?