My vet seemed to think one like this from my cat was a blackhead also. She said she pulls off all kinds of gross things off dogs. She said it was no parasite she or the other vet had ever seen.
I found the exact same thing on my cat. It looked EXACTLY the same. I pulled it out with a tweezers and brought it to the vet (she said next time, call - because yesterday we took the cat in: both of our cats are suddenly overgrooming leaving bald patches, and one seems to be having an allergic...