The acid itself is quite potent, a few milliliters will bore a hole a few inches deep before dispersing. 

Like most oily or sludgy fluids on feathers, a small amount is quite deceptive in volume.

Again, cited:

[url=http://www.youtube.com/watch?v=5mW6h0X7uK8]Here[/url]

You can edit it if you would like~