Hard to tell from the picture but my guess is some sort of nature function for the leather IMO. Several times my leather has produced small, sugar-size, black dots out of its "pores". The black dots come out of all of the pores at basically the same time followed by a slim shed. I am guessing mine is either exporting waste :pottytrain4: or producing eggs. I had a emerald munching on my leather and the damage pretty apparent.