It could be an ear infection (yeast). My puppy had it and it looked like brown 'dirt'. I got some drops from the vet and it cleared up nicely within a week.I give my dog ear drops every other week. I was just attempting to do this and noticed this dark stuff in her ear. It looks like black ear wax and there was a good amount of it. Does anyone know what this is and is it something I should take her to the vet for? Is it dirt mixed with ear wax? I took a q-tip and got some of it out but I didn't get all of it since I dont want to risk hitting her ear drum. Thanks!