Black Dots On Dogs Skin. It could be related to fleas, the dots could in addition, watch for any changes in dog's skin, his/her behaviour, energy level, nausea/vomiting, wheezing, etc. There are a few common possibilities.

Why does my dog have black spots on his skin?

Some causes include black and dark brown spots on the skin that occur with aging can turn into serious conditions. Black dots on dogs' skin are referred to as comedones. My dog recently got this black spot on her chest. Nothing besides the black dots mentioned above.